The Change from Roman Numerals - Numberphile

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  • Опубликовано: 20 ноя 2024

Комментарии • 575

  • @numberphile
    @numberphile  14 дней назад +20

    Objectivity Videos: ruclips.net/user/objectivityvideos
    Patrons can enjoy some extra pictures and scans from this video here: www.patreon.com/posts/115548802
    Rob's book Much Ado About Numbers... Amazon: amzn.to/3zFinog

    • @AbbeyRoad69147
      @AbbeyRoad69147 13 дней назад +1

      Please can you tell him to wear GLOVES when he touches the pages!!!!!!!! This is our history!!!!!!!!!!!!!!!!!!!

  • @jrneconman
    @jrneconman 14 дней назад +401

    This conversion to the modern system came much later than I thought, very interesting!

    • @shruggzdastr8-facedclown
      @shruggzdastr8-facedclown 14 дней назад +18

      It kinda makes sense, though, given how far away England is from where this number system originated. It had to metriculate its way thru the rest of Europe (from Greece and Turkey all the way west to France) before reaching England. Each city, town and village along the way needed some amount of time to get accustomed to the new system before it went viral to the next population center. Given, also, that this was during a time long before the arrival of the internal-combustion engine and, first, telegraph/telephone cables and, later, fiber-optic cables, the average speed of information-sharing was somewhere between a human's walking pace and a horse's full gallop -- as had been the case for many millennia prior

    • @EebstertheGreat
      @EebstertheGreat 13 дней назад

      @@shruggzdastr8-facedclown Arabic numerals did not spread town to town the way spoken vernacular spreads. They spread from one scholarly community to another by distribution of written manuscripts and occasionally books. The reason the spread was so slow was the limited knowledge of Latin in England and, more importantly, the inability to print much in volume. Uptake of Arabic numerals in England was rapid following the invention of the printing press.
      It's worth pointing out that it wasn't just England that rarely used Arabic numerals before the 15th century. That was true in all of Europe outside of Al-Andalus, even in Greece. Italian merchants did adopt Arabic numerals earlier due to the influence of Fibonacci, but the general literate public did not. It never had any significant spread outside of Italy until after the invention of the printing press, when it started to spread in incunabula.
      The thing is, even a century after these started to become mainstream in England, they had not displaced Roman numerals, as you see here. Both continued to be used by most literate people, and to some extent, they still are (though Arabic numerals had displaced Roman numerals for most purposes by the end of the 18th century).

    • @marlonbryanmunoznunez3179
      @marlonbryanmunoznunez3179 13 дней назад +6

      Weren't those numbers introduced through Muslim Spain and Northern Italy? I remember reading that Toledan scholars were familiar with the number system through translations of Arab works and Fibonacci encountered the numbers during a travel to Algeria and introduced them to Northern Italy at his return. Then when the printing press became available the system expanded from those places where it was being used locally.

    • @nathanielb3510
      @nathanielb3510 10 дней назад

      @@shruggzdastr8-facedclown I'm pretty sure that learned people in big population centres, scholars, clergy, nobility, would adopt and use the system before it had to go to "each city, town, and village along the way". On the Wikipedia page for the Liber Abaci, it mentions a version of the book in 1227 dedicated to Michael Scot, of (unsurprisingly) Scotland.
      So I think the Hindu-Arabic numerals taking centuries to catch on in some circles has to do with cultural inertia, rather than England being a backwater.

    • @mickvonbornemann3824
      @mickvonbornemann3824 7 дней назад

      Arab numerals have been found in France from the 13th Century

  • @friiq0
    @friiq0 13 дней назад +115

    I love that he was practicing the multiplication with the new numerals. A huge multiplication like that would have been a nightmare to calculate in Roman numerals, so I suspect it must have been quite novel and amazing to people of that time to see how useful this new number system was!

    • @robertewalt7789
      @robertewalt7789 10 дней назад +8

      Even in those days, Western European merchants used abacuses to do calculations, which used decimal places.

    • @WyvernYT
      @WyvernYT 9 часов назад

      It's like a paper abacus - fast and easy!

  • @babsibecause
    @babsibecause 13 дней назад +271

    the „1“ with the long tail is actually still a thing outside the UK/US, in german speaking countries it‘s quite common. To avoid confusion, 7s are written with a horizontal line.

    • @WaterShowsProd
      @WaterShowsProd 13 дней назад +18

      I was going to mention this. It's quite common to find in many places around the world.

    • @thomicrisler9855
      @thomicrisler9855 13 дней назад +15

      I (an American) write my 1s with the "tail" (never would have thought to call it that) when it's on its own, but as just a vertical line when it's a part of a longer number.

    • @rowejon
      @rowejon 13 дней назад +16

      When I moved from the UK to the Netherlands I started writing 7s with a crossbar. It just avoids confusion.

    • @100percentSNAFU
      @100percentSNAFU 13 дней назад +8

      ​@@thomicrisler9855Also American, and I do the same. I also always put a slash through my zeroes whenever I am using numbers and letters in the same space to avoid a zero looking like the letter "O"

    • @85Pando
      @85Pando 13 дней назад +4

      Came here to say that as well... Using only I for 1 makes it confusable 1 and 7 have to be distinguishable as well. Same with O and 0 (thats why I strike My 0 as well).
      Anyone else do manual crypto?

  • @pcsledge
    @pcsledge 14 дней назад +265

    At 10:48 the actual mistake is that the "8" in 24680 should be a "9", so 24690.

    • @LarsHHoog
      @LarsHHoog 14 дней назад +18

      He may have doubled then from right to left and forgot about a carry from 2×5

    • @BobStein
      @BobStein 14 дней назад +27

      @@LarsHHoog Ah so the animation at 10:55 is misleading, but the audio may be correct. The missing carry is in the tens digit of 12345 x 2 = 24690 not 24680

    • @BenjaminNagelBN
      @BenjaminNagelBN 14 дней назад +12

      ​@BobStein the animation is also wrong, the issue is not the addition of the numbers, but the first multiplication itself. Like @pcsledge mentioned the 8 should be a 9.

    • @BobStein
      @BobStein 14 дней назад

      @@BenjaminNagelBN ...because in multiplying 12345 by 2 there's a carry from the 1's place to the 10's place. That's why the 8 should be a 9.

    • @renyhp
      @renyhp 14 дней назад +8

      the audio is also incorrect as it's going through the rightmost digits of 12345×3 instead of considering 12345×2

  • @BritishBeachcomber
    @BritishBeachcomber 13 дней назад +36

    I love Brady's videos. He asks the kind of questions that the viewer would ask.

  • @mytube001
    @mytube001 14 дней назад +107

    A point about the multiplication exercise... Since Roman numerals don't work like that, he was likely doing it to better learn how to, given the new methods the new number system allowed.

    • @wes643
      @wes643 13 дней назад +23

      I can imagine his delight to see multiplication done so easily. Multiplying Roman numerals must have been a nightmare.

    • @rhill571
      @rhill571 13 дней назад +13

      @@wes643 The shift to using Arabic numerals kind of went hand-in-hand with the shift to doing math on paper rather than with casting-counters. So people using Roman numerals would do multiplication with counters, which is comparable to using an abacus.
      I sort of suspect that's why the receipts were still in Roman numerals. A lot of otherwise illiterate merchants could still do their accounts with counters, so maybe monetary values still tended to be in Roman numerals.

  • @R.B.
    @R.B. 13 дней назад +57

    8:55 I think maybe the dotted I's for 211 are actually being used as carry indicators. The 11 shillings don't have them, but where there are carries, he does have them.

    • @dermaniac5205
      @dermaniac5205 12 дней назад

      The last column is missing the carry indicator, then. There would be one above the 2

    • @R.B.
      @R.B. 12 дней назад +3

      @dermaniac5205 maybe he's inconsistent with it. The point being though that the 11 shillings the line below didn't have the dots. It might have been a notation he was experimenting with and it was working for the i's in 2ii? I guess we need to ask him what he was thinking?

    • @dermaniac5205
      @dermaniac5205 12 дней назад +3

      @@R.B. Yeah, I can see both possibilities. Maybe he was inconsistent about the carry notation, or he was inconsistent about dotting his 1s 🙂

    • @corsaircaruso471
      @corsaircaruso471 11 дней назад

      I had a similar thought.

  • @trwijbenga
    @trwijbenga 14 дней назад +28

    I never really realized there was an transition from roman numerals, but as soon as I saw the title of this video I was interested! Great stuff

  • @Zenitect
    @Zenitect 14 дней назад +43

    Seeing tidbits of normal everyday life from long ago is the most fascinating part of history for me. Great video!

    • @numberphile
      @numberphile  14 дней назад

      Hope you watch my channel Objectivity!?
      ruclips.net/user/objectivityvideos

  • @Timebug22
    @Timebug22 14 дней назад +524

    that X = X mistake is such a relatable mistake, looks perfectly fine until you read it back a day later...

    • @rogercarl3969
      @rogercarl3969 14 дней назад +67

      I have a feeling it is not so much a mistake but a deliberate convention. If it were a mistake is would be a one time thing but in his chart X=X and then it appears in the text. Also it keeps the number to be a single digit taking up less space, which is part of the efficiency to use Arabic numerals in the first place. I say this since I made a program once for cards and 10 is the only card that needed two spaces (annoying for what I was trying to accomplish) so turned it into an X. There are benefits to its usage.

    • @mr.pavone9719
      @mr.pavone9719 14 дней назад +34

      It also shows that he's still using x for 10 so he doesn't throw anyone off. He's made so many changes to his accounting it's important to let people know what hasn't changed.

    • @tomgidden
      @tomgidden 14 дней назад +13

      Hey, it worked for Apple's iPhone numbering!

    • @sammarks9146
      @sammarks9146 14 дней назад +1

      It’s the Laurie Anderson Theorem

    • @werdwerdus
      @werdwerdus 14 дней назад

      1 Doge still equals 1 Doge
      iykyk

  • @spacedoubt15
    @spacedoubt15 14 дней назад +27

    3:33 I think what's interesting is the use of the more convenient modern script for years, which if written out in roman numerals can prove to be quite long, while sticking to roman script for everyday accounting numbers which are more important to get right in the short term.

  • @JavierSalcedoC
    @JavierSalcedoC 13 дней назад +18

    few people know this but Shakespeare was the first non-royal person to own a stake (12.5%) of a theater in the UK, putting together the "content creation" with the "content distribution" for the first time. The Globe was like the iTunes of the time

  • @PerMortensen
    @PerMortensen 13 дней назад +31

    I'm quite surprised that the switch from Roman to Arabic numerals happened as late as the 1500s. I don't know when exactly I'd have thought it occurred, but certainly I'd have guessed centuries earlier.

    • @noirdezzir8424
      @noirdezzir8424 7 дней назад +3

      This transition to Indian numerals is not really fully complete yet. They still use some Roman numerals for nostalgic or ornamental purposes.

    • @Andernol
      @Andernol 3 дня назад +1

      They're saying it specifically was happening in England in the 1500's. European texts with numerals started being published in the 13th century but it was a very gradual process over hundreds of years.

  • @matthewscott7198
    @matthewscott7198 12 дней назад +11

    "ij" and"iij" are still used in books of Gregorian Chant to indicate that something is to be sung twice or thrice, i.e. the usual 3x3 (often with variation the third time) of the Kyrie.

  • @SebBrosig
    @SebBrosig 14 дней назад +175

    the j at the end instead of the last i: foreshadowing electrical engineers.

    • @ruudh.g.vantol4306
      @ruudh.g.vantol4306 14 дней назад +15

      Compare also the Dutch “ij”, as one of its origins is the long-i.

    • @DruHarden
      @DruHarden 14 дней назад +30

      Linguistically at this time J was just considered a special kind of I. So it makes more sense than it seems.

    • @dlevi67
      @dlevi67 14 дней назад +16

      @@DruHarden In Italian J is still called 'I lunga' - long I - to this day (and used very rarely/archaically where 'I' has a semi-consonantal value).

    • @deinauge7894
      @deinauge7894 13 дней назад +7

      to me it is similar to arabic writing, where the last letter of a word often has a curvy tail added

    • @pmmeurcatpics
      @pmmeurcatpics 13 дней назад +6

      ​@@deinauge7894also Greek sigma!

  • @bobrong9645
    @bobrong9645 14 дней назад +108

    Fun (?) fact: the "long tail" of the 1 looks perfectly normal to me, and probably to most French people too. And if you wonder how we differentiate our 1s from our 7s, the question's never occurred to me (not the same angle?), but 7 has an extra dash anyway.

    • @mytube001
      @mytube001 14 дней назад +5

      I write a seven with a dash through it, but I would never write a one anything like a seven. That just looks ugly and confusing.

    • @yagelbar
      @yagelbar 14 дней назад +19

      Look at the computer digit 1. Even here in this line.
      It doesn't look like a l and not like a 7.

    • @shaevor5680
      @shaevor5680 14 дней назад +13

      same for Germany

    • @jonathanrichards593
      @jonathanrichards593 14 дней назад +12

      Yes, came here to say the same thing. All my mainland European friends and acquaintances will write a 1 with a tail, often more so than the example at 7:40. And I am in the habit of putting a dash through a 7, even though that's not how I was taught in the England of the 1950s.

    • @MrDannyDetail
      @MrDannyDetail 14 дней назад +2

      I thought the figure he pointed at was actually a one with a 'cap' rather than a tail. Ones can still be written today with a cap, but if so they usually also have a horizontal base added to help differentiate them from twos. I also put a dash across my sevens.

  • @rikschaaf
    @rikschaaf 14 дней назад +22

    10:58 He made a mistake in the multiplication, not in the final addition. 3+0 = 3, 0+8+5 does equal 3 (carry 1) and 1+7+6+4 = 8 (carry 1), so that would be correct. The problem is the 8 in 24680. That should be a 9, because 2x5 = 0 *_(carry 1),_* 2x4 *_+1_* = 9 (not 8). So he forgot to carry the 1 there. The number 10 was definitely his weak spot :D

  • @BojoPigeon
    @BojoPigeon 14 дней назад +22

    One of the fun things I found browsing around the Digital Vatican Library on-line was that things that looked _exactly_ like Excel Spreadsheets went back even further than the use of Hindu-Arabic numbers in Europe. The only difference was that the had separate columns for I, X, C, M etc, to make the math easier.

  • @otterlyso
    @otterlyso 13 дней назад +7

    They are in Dulwich College, which was founded by Edward Alleyn, who acted leading roles in Shakespeare and Marlowe, and which is where PG Wodehouse and Raymond Chandler went to school.

  • @arnauarnauarnau
    @arnauarnauarnau 13 дней назад +6

    Feels like a mix of objectivity and numberphile. Love it

  • @iabervon
    @iabervon 14 дней назад +14

    I think the reason marking the ends of numbers was important was that words and units were made of the same symbols. If the gap is a little small and the next word starts with a letter used in Roman numerals, it would be easy to misinterpret.

    • @AthAthanasius
      @AthAthanasius 14 дней назад +3

      Yup, "one two" -> "i ii" could be misread as a three, but "j ij" wouldn't be.

    • @iabervon
      @iabervon 14 дней назад +6

      @AthAthanasius I was also thinking of iL. Is that 49, or 1 Pound Sterling? Putting a tail on the end of the number distinguishes them.

  • @AltayHunter
    @AltayHunter 13 дней назад +5

    6:22 Brady is actually correct for any number that doesn't already contain a V and only has a single I at the end. For example, you could change XI (11) to XIV (14) by adding a V at the end.

  • @sharbean
    @sharbean 12 дней назад +2

    I honestly don’t know why I did not know when and how the number system shifted.
    Now I am off to find more details.
    Thanks for the video!

  • @johnredberg
    @johnredberg 14 дней назад +18

    I had to chuckle at the "scripty one" with the "long tail" that took a long time to disappear. Guess what, it many handwritten scripts it hasn't disappeared 🙂 In German-speaking countries, people still write "one" with a flag, and "seven" with a longer flag and, to be really sure, a bar crossing the stem.

    • @equolizer
      @equolizer 14 дней назад +2

      I (also German) learned to write 'one' as a diagonal line going up and right from about the middle of the space to the top and then a vertical line down (to be honest not that different from how it looks here: 1, just the diagonal is longer) and 'seven' as a horizontal line at the top going right, followed by a diagonal line going left all the way to the bottom and then cross out the diagonal somewhere in the middle (also like '7', just with a crossed out diagonal to keep it distinguishable from 1 when you write it sloppily)

  • @benespection
    @benespection 13 дней назад +8

    8:40 The dots on top of the 1's are not because he's romanised them, it's surely because as he's done the addition these dots represent the carry over. I do the same thing since it's faster and smaller than writing a 1.

    • @rschroev
      @rschroev 10 дней назад +1

      That's what I thought too. But are they in the right place for that? I must admit I didn't do the effort of checking that.

  • @ThomasRichardson-lj1ig
    @ThomasRichardson-lj1ig 14 дней назад +4

    I love these videos about the history of mathematics (and science). I hope you'll make more! The Objectivity channel has been great for the same reason.

  • @OlliWilkman
    @OlliWilkman 14 дней назад +13

    I can't say for sure about Shakespeare's times, but comparing the three pounds made by the Shakespeare play to some examples of the value of money a hundred or so years later (from Liza Picard's book "Restoration London").
    In the 1660s, one penny would buy you a loaf of bread, or a pound of cheap cheese, or a few herrings. A pound of bacon was nine pence. A roast beef dinner for four in an inn was five shillings. A pair of boots cost 30 shillings. Samuel Pepys paid £24 for a silk suit at some point. A servant or maid earned about £4 per year (960 pence), a shopkeeper or tradesman about £10 per year, a layer £22 per year.

    • @widmo206
      @widmo206 14 дней назад

      That was for the "posh" seats
      He mentions just after that regular people paid a penny

    • @OlliWilkman
      @OlliWilkman 14 дней назад +5

      @@widmo206 Yeah, the three pounds was the recorded total for the "posh seats". In a 1660s theatre, the expensive seats were four shillings (48 pence) in a box or one shilling (12 pence) in the gallery.

    • @egodreas
      @egodreas 14 дней назад +3

      Those numbers are really interesting! A typical loaf of bread is about £1.75 today, and you would be hard pressed to find any cheese for less than £3/pound. But if we say that a penny in the 1660s is about £2 today, then the lawyer's annual salary would correspond to only £10,000 today. Or conversely, if we normalize the conversion on a lawyer's salary of £50,000 (which is the current average), that would mean that a loaf of bread in 1660 was worth almost £10.

    • @_Wombat
      @_Wombat 13 дней назад

      @@egodreas it makes sense to me that lawyers are more in demand in today's society than they were back in the 1500s.

    • @100percentSNAFU
      @100percentSNAFU 13 дней назад +2

      Things tend to get out of whack in terms of monetary value the further you go back. For example, a coke or a cup of coffee 100 years ago would have been a nickel (5 pennies) in the United States, but today is closer to $3, however inflation has not been 60x in the last 100 years, probably closer to 20x. Yet things like electronics and more modern things have actually come way down in price. A new color television in the 1980's probably would have cost about $500 in 1980's dollars, for what would be considered today a very small screen and obviously an inferior picture. You can go pick up a 40" flat screen today for under $200 if you shop around a bit. $500 in 1980 would be like almost $2500 today.

  • @user-qf6yt3id3w
    @user-qf6yt3id3w 14 дней назад +10

    That is absolutely fascinating. He's heard of a new technique and is playing with it to see how much easier it is to use than the old way of doing things.

  • @Akronymus_
    @Akronymus_ 14 дней назад +22

    at around 10:30 ... Placeholder zeros? We certainly don't use them over here in austria. So that came as a surprise to me.

    • @John_Ridley
      @John_Ridley 14 дней назад +9

      I wasn't taught them in the US either

    • @mytube001
      @mytube001 14 дней назад +5

      Same in Sweden.

    • @culwin
      @culwin 14 дней назад +3

      In the US, I learned to use them as a kid, but we probably stopped using them by the time we were in 6th grade.

    • @ailaG
      @ailaG 14 дней назад

      Same, Israel

    • @rmsgrey
      @rmsgrey 14 дней назад +8

      They're the sort of thing that teachers put in to make it easier to see what's happening, and get used by people who don't do much hand calculation, but which get quietly dropped by anyone actually working with numbers as so much wasted ink.

  • @RokStembergar
    @RokStembergar 14 дней назад +3

    This is a wonderful video,for anyone that worked on it, thank you! It was lovely!

  • @PopeLando
    @PopeLando 14 дней назад +90

    Suspicious boss: "So we took EXACTLY 400 pounds?"
    Box office: "Uhh... and sixpence! Four hundred pounds and sixpence."

    • @DeadJDona
      @DeadJDona 14 дней назад +4

      in 2 days!

    • @nanamacapagal8342
      @nanamacapagal8342 13 дней назад +11

      Reminds me of how Mt. Everest is exactly 29000 ft, but if tour guides say that then hikers would assume they're rounding off. So they instead say Mt. Everest is 29003 ft

    • @user-rm9zx7ln9i
      @user-rm9zx7ln9i 13 дней назад +1

      Said Nobby.

    • @tulliusexmisc2191
      @tulliusexmisc2191 10 дней назад +2

      @@nanamacapagal8342 It's not just tour guides, it was the official measurment by the first accurate cartographers.

    • @thekinginyellow1744
      @thekinginyellow1744 10 дней назад +5

      @@nanamacapagal8342 Not sure where you are getting your data, but as of 2020, the officially accepted (by China, Nepal and Nat Geo,...) height for Everest is ~29032' for "snow height" and 29017' for "rock height".

  • @marksteers3424
    @marksteers3424 13 дней назад +3

    At 11:00 - surely it is the mulitply by 2 that is wrong - it should be 24690

  • @Adileigh23
    @Adileigh23 4 дня назад

    Seeing that book where both numbering systems were used interchangeably was amazing-it’s such a unique glimpse into history. It’s interesting to think about how societies transition between systems and how we’re still living through that process in some ways today!

  • @Sam_on_YouTube
    @Sam_on_YouTube 14 дней назад +64

    You made a mistake in explaining the mistake. The missed carried 1 wasn't on the first line, multiplying 3 by 12345, but in the 2nd line multiplying 2 by 12345. He forgot to carry the 1 when he multiplied 5 by 2 to get 10. The 8 when multiplying 4 by 2 should have that 1 added to it to become a 9.

    • @Posby95
      @Posby95 14 дней назад +6

      Exactly. I was getting so confused about the man's explanation.

    • @werdwerdus
      @werdwerdus 14 дней назад +1

      thank you ❤

    • @DragoniteSpam
      @DragoniteSpam 14 дней назад +2

      I think we need a name for this. How about Parker Multiplication?

  • @robynduckworth4160
    @robynduckworth4160 13 дней назад +1

    Number systems are great - it's fascinating how different cultures have developed different systems to count and then to make their way of writing those numbers simpler.

  • @judychurley6623
    @judychurley6623 14 дней назад +21

    The 'tail' on the 1 is still very prominent here in Italy.

  • @wcsxwcsx
    @wcsxwcsx 13 дней назад

    A fascinating presentation of how the numerals changed. What's also very interesting is how the original Indian numerals morphed into our present-day numerals. It makes perfect sense, though you never noticed it.

  • @tozainamboku
    @tozainamboku 14 дней назад +3

    It was interesting the Henslowe aways used the new numerals to write the year of the performance, since one of the places were Roman numerals are often still used is to write the year for the copyright at the end of the credits of a film.

  • @robertpaulson2043
    @robertpaulson2043 9 дней назад

    I don't know why i never thought of it but i had no idea the switch from roman numerals was that late! Great stuff.

  • @davejblair
    @davejblair 6 дней назад

    Mind slighty blown by this. What astounds me is that anything ever got done in the 159i. Writing in roman numerals and indo-arabic, in imperial currency, adding unnecessary Js to the end and then jumbling it all up. Throw in a bit of black death, lack of electricity and patchy internet and I realise this was a hard time to be alive. Respe100t.

  • @acelm8437
    @acelm8437 13 дней назад +7

    11:33 Apparently there was a play performed on February 29, 1591. Did they have different leap years back then?

    • @arunabhganodwale1022
      @arunabhganodwale1022 12 дней назад +3

      They did use the Julian calendar, probably, the Gregorian was proposed only a decade back; but the leap years were the same. So please someone give a better reply.

    • @SlothMothCloth
      @SlothMothCloth 11 дней назад +6

      While they were indeed using the Julian calendar, and the main difference between the Julian and the Gregorian calendar is where the leap years are, the only difference is that in the Gregorian calendar years that are divisible by 100 are NOT leap years UNLESS they are also divisible by 400.
      So 1591 is not a leap year in either the Gregorian or the Julian calendar. However, I found this on Wikipedia:
      > In common usage, 1 January was regarded as New Year's Day and celebrated as such, but from the 12th century until 1751 the legal year in England began on 25 March.
      So 29th of February 1591 in the legal year, which Henslowe seems to be using here, would be 1592 in common usage, which is indeed a leap year.

  • @uuu12343
    @uuu12343 13 дней назад

    This video is fascinating, absolutely stunning how much maths the everyday man - you, and I - are doing even for fun and you would never know until maybe a thousand years later

  • @ekinmahmuzlu4605
    @ekinmahmuzlu4605 9 дней назад +1

    As an Ottoman economic historian, who dealt with handwritten numbers on old documents; I want to share some of my educated guess: 1) The old clercks like to to extent their last letter/numbers to put an end to the word/number, because they were using ink. The ink written letter/number in another page or back-page could stain the end of a word/number and clerck could misread the word/number (or someone with ill intention could add a number). Especially in handwritten checks, you should draw a line in the end to prevent someone to end a number 2) As I see, Henslowe use both numbers new and old. The generation who were born before the Turkish alphabet revolution in the 1920s, were inclide to take notes in Arabic letters, when they are hurry but they use latin in official documents. I assume Henslowe use old Roman numbers when he counted, but use the new ones, when he calculated something.

  • @090darknight
    @090darknight 14 дней назад +6

    The bar in the "1" in handwriting is the normal here in Germany and I think many other European countries too. We make an extra line across at the 7 like a wonky plus with a ribbon 😅 I kinda like that more then the "I" as a one, cause it has somehow more structure as a symbol imo 😅

    • @tomgidden
      @tomgidden 14 дней назад +3

      Mmm... in France I've seen the '1' bar go all the way down to the baseline -- /| -- so it's sometimes longer (by Pythagoras) than the upstroke.
      I write a normal 1 with a short bar or no bar, but I always cross my 7 as well. And sometimes my zeroes, but that's more a programmer thing!

    • @100percentSNAFU
      @100percentSNAFU 13 дней назад

      ​@@tomgiddenI'm an accountant and I put the slash through zeroes, in fact a lot of us do. Not even sure why as we are working mostly with numbers and not letters, as normally you would do so to avoid confusion with the letter "O". We also use parentheses () for negative numbers instead of a minus sign.

  • @heaslyben
    @heaslyben 13 дней назад +1

    I love all this! At 8:36 I think the little dots on top of the ones in 211 are the carries! They might also be a pun on Roman numerals, but the other ones in this example don't have dots.

  • @Science4Real
    @Science4Real 13 дней назад +6

    From blending Roman and Indo Arabic numerals to small calculation errors, it all reveals the clumsiness and uncertainty of a generation starting to familiarize itself with modern numbers. These historical “ink stains” are truly precious and full of life.

  • @jamestappin4741
    @jamestappin4741 14 дней назад +12

    Surely the dots in the addition at about 9:10 are the carried ones from the previous column.

    • @heaslyben
      @heaslyben 13 дней назад +2

      I agree completely, but please don't call me Shirley.

  • @Certamaniac
    @Certamaniac 12 дней назад +2

    The OED suggests that the etymology for "Box office" was because it was the office where you sold private box seating at a theatre, not because a box collected the payments.

  • @chaotischekreativitat9391
    @chaotischekreativitat9391 11 дней назад

    It's a bit off-topic, but I noticed that there are very interesting Numberphile videos about some of the Millenial problems while other problems seem to be not covered at all.
    I'd absolutely love to see explanatory videos about e.g. the Hodge conjecture and really hope that they will be uploaded one day 🤞

  • @boredgrass
    @boredgrass 4 дня назад

    I venture: Mathematics existence is intermediary. It comes into life when people think about it or talk to each other about it and it flourishes when we do it with curiosity, kindness, decency and humour.

  • @mpetersen6
    @mpetersen6 9 дней назад

    The numeric system we use today was one of the greatest inventions human history. I find it hard to believe that no other society that was using math did not do the same thing. Not the same symbols. But the use of a smallset of symbols that can be combined in ways to represent trillions upon trillions of numbers.
    PS Glad to see you credit the Indians.

  • @SparksMaths
    @SparksMaths 13 дней назад

    Lovely stuff Brady and Rob! So nice to glimpse humanity wrestling with numbers from 400 years ago

  • @The_Omegaman
    @The_Omegaman 14 дней назад +1

    I like these historical math videos. Keep them coming.

  • @tristanridley1601
    @tristanridley1601 7 дней назад

    It's amazing it took 1000 years for Hindu numerals to make it to England. Fascinating to see humans learning the new better system.

  • @GoetiaTV
    @GoetiaTV 14 дней назад +5

    What an incredible artifact. One of those concepts I never would’ve thought about, but when pointed out is astounding. And it being theatre-related is icing on the cake.

  • @Vccv-m8p
    @Vccv-m8p 11 дней назад

    Another fantastic video from this channel. Love it

  • @InventorZahran
    @InventorZahran 13 часов назад +1

    C = century = 100
    D = demi-millennium? = 500
    M = millennium = 1,000

  • @dcseain
    @dcseain 4 дня назад

    I grew up in a house in which all the clocks had Roman numerals. I had to learn to read clocks with Indo-Arabic numbers all over again when I started school at age 5.

  • @sylvainlefebvre8099
    @sylvainlefebvre8099 14 дней назад +20

    At 08:39, those not dots on top of the 1, but the carries that are marked by a dot, the 2 + 1 + carry was obvious. No other 1 have dot on top...

    • @Juan-qv5nc
      @Juan-qv5nc 14 дней назад +4

      For a moment I also thought that those dots were carries but it made no sense to not write the one on top of the leftmost 2, unless the writer had forgot it. However, I checked the video and at 3:38 the dots appear over the 1. They also appear thereafter. Therefore, those dots are not carries, they are part of the 1. Go figure.

    • @kuronosan
      @kuronosan 14 дней назад +1

      @@Juan-qv5nc Have you considered they are carries in one context and not carries in another.

    • @heaslyben
      @heaslyben 13 дней назад +1

      The writer might have been enjoying a little "pun", making the carries look like Roman dots.

  • @mikethespike7579
    @mikethespike7579 7 дней назад +1

    Multiplications with Roman numerals is a right pain in the backside. He must have figured that the new Indo-Arabic system was far easier and were trying it out.

  • @davidgroskind3233
    @davidgroskind3233 8 дней назад

    The math textbook used in Shakespeare's school years begins with a conversion table showing the equivalent of the new Arabic numbers to the better-known Roman numerals. The table reads 10 signifies X, 5 signifies V, 1 signifies I. Because there is no equivalent to zero in Roman numerals, the last line of the table is "0 signifies nothing." Shakespeare used it as the last line of the Tomorrow and Tomorrow and Tomorrow soliloquy in Macbeth, a phrase that would have been familiar to every schoolchild.

  • @Mark_LaCroix
    @Mark_LaCroix 10 дней назад +1

    Hilariously, Google's auto-captions for this transcribe "Henry the sixth" to "Henry VI 6." Even today we're dealing with odd intersections of Roman and Arabic numerals!

  • @kaiboshvanhortonsnort359
    @kaiboshvanhortonsnort359 12 дней назад

    Great stuff. Glimpsing into everyday life in a past few of us can visualize.

  • @evanbasnaw
    @evanbasnaw 14 дней назад +1

    This is fascinating. I'm a numbers guy and a calligraphy enthusiast. I'm totally out of my depth trying to read these numbers on the page.
    Makes me wonder what people would think of my scratchpad 400 years down the road if they happened upon it.

  • @davidmilhouscarter8198
    @davidmilhouscarter8198 13 дней назад +3

    8:29 Do you know why the symbol for pounds is L? Why the abbreviation is lbs.? Libra or libras (plural) is Latin for the word pound.

  • @phu010
    @phu010 14 дней назад +2

    When I was at school (many, many years ago) I was taught when adding up to put a dot over the appropriate column if I needed to carry one. In the case of the £211/9/0 I think the dots are carries.

    • @jimmyzhao2673
      @jimmyzhao2673 13 дней назад +1

      I was taught to use dots for the carry as well.

  • @GroovingPict
    @GroovingPict 13 дней назад +1

    The j as 1 at the end in lowercase Roman numerals lasted well into the 19th century I believe, and is more like a flourish than anything else. Remember that I and J were not seen as separate letters until relatively recently. Same with U and V

    • @karl-linus-amsler
      @karl-linus-amsler 13 дней назад +1

      In German you still have the phrase "Ein X für ein U vormachen" - "To make an X out of an U" when somebody tries to fool you. As the V for 5 could be changed easily into an X for 10 and suddenly you had to pay a higher price than initially agreed.

  • @EebstertheGreat
    @EebstertheGreat 14 дней назад +4

    7:37 Well, that form never really did go away in some places, did it? That seems pretty typical in France. Certainly it looks more like a French 1 than a French 7.

    • @damjanjerina6812
      @damjanjerina6812 13 дней назад +1

      Yes. Looks like a perfectly fine 1 to me. We add a little line to 7 so it is not mistaken for 1.

    • @boumbh
      @boumbh 11 дней назад +1

      I'm French, you can't say that it disappeared, rather say that some people around the world wrongfuly forgot about it. 😂

  • @BaronVonQuiply
    @BaronVonQuiply 7 дней назад +1

    A topic that must come up at least C times a day

  • @mikew6644
    @mikew6644 14 дней назад +1

    What a fun story! Have never thought about transition before

  • @TheGreatAtario
    @TheGreatAtario 12 дней назад

    A video that qualifies as both Numberphile and Objectivity

  • @richardminnich4249
    @richardminnich4249 10 дней назад +1

    Roman numerals are like spelling each number as a separate word, without a logical relationship to each other that was obvious - especially when the numerals are long. Modern mathematics really needs to have the indo-Arabic numbers. That and the addition of the zero! LOL

  • @nachis04
    @nachis04 14 дней назад

    The example of unit systems coexisting is a good example of things transitioning as needed and fluidly. Another good example is that we are still using Roman numerals today

  • @purpleapple4052
    @purpleapple4052 14 дней назад +3

    Oh reminds me of reading a letter to the King of Portugal regarding the "discovery" of Brazil, happened and written in 1500, I was surprised to see it used Roman numerals still and was curious to see when the change happened... I haven't watched it fully so maybe it will be mentioned too but iirc Russia used Cyrillic numerals up until the 1700s?

  • @_Wombat
    @_Wombat 13 дней назад +1

    I must admit I'd never realised this transition even happened. We are so used to our current numerals. I vaguely sort of assumed that Roman numerals left when the Romans did!
    And of course potentially the final remaining use of Roman numerals today is when you carve the date your house was built?

    • @100percentSNAFU
      @100percentSNAFU 13 дней назад +2

      I guess the transition had to happen at some point, but definitely we are so used to modern numerals that you don't think about it. And also I would have thought the transition would have actually been quite a bit prior to the 1500's. Learn something new every day!

  • @travisfinucane
    @travisfinucane 3 дня назад

    10:30 I don't believe I ever learned to use placeholder zeros, just to line up the next row as shown. Probably because we were only taught to memorize the algorithm, without informing us that "this is multiplying by the tens place, so the answer needs to be 10x".

  • @revolutionarydefeatism
    @revolutionarydefeatism 2 дня назад +1

    7:36 that long tail never disappeared in Italy! Sometimes the tail is longer that the 1 itself!

  • @musiqtee
    @musiqtee 12 дней назад +1

    How we always deem ineligible handwriting beautiful, tells a lot about humanity. Also how a reductive list of reasons, can’t fully explain why…

  • @mickvonbornemann3824
    @mickvonbornemann3824 7 дней назад

    I saw a doco showing that hidden away inside the roof spaces of Gothic Cathedrals in France were measure markings across the 13th Century stones in Arab numerals. They suggested that maybe that development was integral to the development of being able to be the greatest of these cathedrals.

  • @reedr7142
    @reedr7142 9 дней назад

    “I can’t fault his algebra.”
    That was great.

  • @MichaelMcCausland-pg6qs
    @MichaelMcCausland-pg6qs 14 дней назад +2

    Milton was the rockstar during Shakespeare’s time. It wasn’t until afterwards that they made him this for whoever they are iconic figure.

    • @bobrong9645
      @bobrong9645 14 дней назад +1

      Don't you mean Marlowe? Milton was a bona fide puritan, so not exactly a rock star, by definition.

    • @forthrightgambitia1032
      @forthrightgambitia1032 13 дней назад

      And also a different generation.

    • @WaterShowsProd
      @WaterShowsProd 13 дней назад

      I thought it was Johnson who was considered the best playwright of Shakespeare's time. At any rate, it wasn't until about a century after Shakespeare's death that his work was re-examined and re-evaluated. Naturally, immediately after his death his work was deemed old fashioned, as would happen today... er, would have happened in The 20th Century. I remember reading once that The Yale Library had a copy of Shakespeare's plays "for light reading". Not to say he wasn't popular in his time, but in the same way that a hit filmmaker is appreciated today as opposed to great artist. I think that's an interesting comment on society and culture.

  • @TheJamesRedwood
    @TheJamesRedwood 13 дней назад

    7:44 obviously in Europe that tail did not disappear, it is still used today, which is why they need to distinguish the seven by putting a horizontal line though the vertical part of the number.

  • @mikmop
    @mikmop 9 дней назад

    Just as an aside, the town of Dulwich in South London, known for Dulwich College, was the eponymous town (aka namesake town) for the suburb of Dulwich Hill, in Sydney, Australia, which is where I live. It is a suburb known for its Federation-style homes, which even though it has nothing to do with this video, I thought was an interesting piece of trivia given that I lived here.

  • @donovandownes5064
    @donovandownes5064 14 дней назад +2

    7:37 confusing to any Germans, since that is literally how they still write these both 1 and 9. (also note how they look kind of like this when you type them)

  • @ThePracticalPeasant
    @ThePracticalPeasant 13 дней назад

    If the number was XI (11), one could add an X to the end to make XIX which is 19. Though many examples of adding a character to the end would result in an invalid format, some examples would in fact result in a valid (larger) number.
    You can add any character after a lone I
    You can add the last character until there are 3 at the end (except L and D)
    You can add V or X to anything ending in XI
    You can add C or X to anything ending in CI
    You can add M, C, or X to anything ending in MI
    ...and those are the obvious ones.

  • @jonathanrichards593
    @jonathanrichards593 14 дней назад

    11:32 - at least three performances of The Jew of Malta by Christopher Marlowe are listed there in Feb-Mar 1591, quite soon after it was written. Fascinating, thank you.

  • @kingdomadventures
    @kingdomadventures 13 дней назад

    This had me curious. I never thought before about how arithmetic would have been done in Roman numerals. Perhaps a following video on how to multiply xiv b iil

  • @ekamsat429
    @ekamsat429 12 часов назад

    I learnt the Roman numerals from my school-teacher, Mr. Patel. But I never called these "Romano-Patel" numerals, just factually precise "Roman numerals". Likewise, let us practice saying the phrase "Indian numerals" 10 times. Not "metric" or "Indo-Arabic", or other imprecise convolutions. Try again saying "Indian numerals" a few more times. See, not that hard on the tongue, eh? No misnomer, no prejudice, only a bare fact. Already feels light and good!

  • @ChrisRollins
    @ChrisRollins 9 дней назад

    This was facinating

  • @doglover31418
    @doglover31418 11 дней назад +1

    There's a church at Piddlehinton in Dorset with the date 1497 carved into the west wall. That's how it's written; 1497.

    • @chrisdaignault9845
      @chrisdaignault9845 7 дней назад +1

      To be fair, that’s not a guarantee the number itself was carved in 1497.

  • @HolySoliDeoGloria
    @HolySoliDeoGloria 13 дней назад +1

    6:02 In Greek, a final sigma takes a different form. Four Hebrew letters have different final forms. I don't know any more about why this is, but it is not an isolated practice.

  • @jared_bowden
    @jared_bowden 9 дней назад

    The letter J evolved from adding a tail to the end of the letter I, often when it occurred at the end of words, and in Shakespeare's time the letters J & I were still somewhat interchangeable. So, it's not surprising that they ended their Roman numerals with a "J" (or I with a tail) as it had been done in normal writing for centuries (although in native English there aren't too many words that end with i).

  • @GreenAppelPie
    @GreenAppelPie 14 дней назад +2

    Simply put, Roman Numerals are great for adding and subtracting, but not so much for multiplication and division

    • @haraldmilz8533
      @haraldmilz8533 14 дней назад +1

      And useless for floats.

    • @rmsgrey
      @rmsgrey 14 дней назад +1

      Roman numerals are okay for adding and subtracting, but you still have to deal with making change when you try subtracting LII from DXV

    • @thezipcreator
      @thezipcreator 14 дней назад

      ​@@haraldmilz8533 never seen someone refer to reals as "floats" before (only ever seen it used when specifically referring to IEEE-754 floating point)

  • @camc7416
    @camc7416 7 дней назад

    Thanks for sharing these awesome videos about the coolest tool in the human aresnal, mathematics!!

  • @sidneyfloss9059
    @sidneyfloss9059 9 дней назад

    Very interesting ! but a whole video on how was made the decimal system would be awesome

  • @SteveHodge
    @SteveHodge 13 дней назад

    They were still transitioning to Indo-Arabic numerals in the late 1500s and by the 1670s Newton was working on calculus. I never realised that gap was so short.

  • @SreenathSreekrishna
    @SreenathSreekrishna 14 дней назад +11

    Wow! caught a numberphile video within the first 5 minutes

  • @whophd
    @whophd 10 дней назад

    I’d like to see the same story for other civilisations
    I find it remarkable that each non-digital system was still Base 9+1, in essential ways

  • @karapetrov-ic
    @karapetrov-ic 13 дней назад +2

    Can you do a video about Church Slavonic numerals which were used throughout the middle ages in eastern european countries? They were already using a special kind of decimal system before the indo-arabic numerals came!