One of the most important algebras -- The Witt Algebra

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  • Опубликовано: 7 сен 2024

Комментарии • 528

  • @michaelslack8900
    @michaelslack8900 2 года назад +554

    There is an audience for this kind of content - people like me who vaguely remember this stuff from university, but have been in the real world for a while and like being reminded

    • @Hyakurin_
      @Hyakurin_ 2 года назад +6

      Beautiful comment..

    • @DiegoTuzzolo
      @DiegoTuzzolo 2 года назад +5

      EXACTLY!!!!!
      Please keep making these videos

    • @MichaelFJ1969
      @MichaelFJ1969 2 года назад +2

      Well said! I can totally relate ...

    • @briandennehy6380
      @briandennehy6380 2 года назад +2

      This is me 🖐️

    • @Trythisone264
      @Trythisone264 2 года назад +7

      100% - I’ve not even been in the real world that long and I already miss it

  • @frozenmoon998
    @frozenmoon998 2 года назад +364

    We highly appreciate the exploration into the more difficult math.

    • @void7366
      @void7366 2 года назад +10

      Absolutely

    • @rounaksinha5309
      @rounaksinha5309 2 года назад +8

      Yes sir !

    • @santiagoarce5672
      @santiagoarce5672 2 года назад +10

      Not neccessarily more difficult but more advanced. Some of the olympiad problems he does are really hard but they're not this advanced

    • @mastershooter64
      @mastershooter64 2 года назад +5

      @@santiagoarce5672 Lmao i was literally going to reply the exact same thing. "not more difficult but more advanced"

    • @kosed7041
      @kosed7041 2 года назад

      Are you Bulgarian?

  • @jkid1134
    @jkid1134 2 года назад +203

    Honestly, you should feel even more encouraged to make a video on an unpopular or niche topic. There are a billion resources out there for competition math or Calc 2 help, but with under-represented stuff, you're really meaningfully breaking open ground for new minds to explore.

  • @STCB
    @STCB 2 года назад +144

    +1 for both
    - a follow-up on the Virasoro algebra &
    - generally, more videos like this
    Thank you very much! 🙏🏼

  • @mehrdadassar2542
    @mehrdadassar2542 2 года назад +38

    Yes more videos about Algebras, Lie groups, Representations, Manifolds, Hilbert Spaces, Operators, Operator Algebras,............

  • @Alex_Deam
    @Alex_Deam 2 года назад +172

    These videos are at the perfect level imo, introducing something new and abstract but at such a level that anyone who is okay with (e.g.) linear algebra or polynomials can dig in. One suggestion: it would be nice to end with a recommend resource (e.g. standard textbook) for those inspired to find out more. Anyway, extremely here for any follow up videos - but regardless, focus on making content you enjoy so you don't get burnt out!

    • @thomasreid2609
      @thomasreid2609 2 года назад +9

      Yes! A reccomendation for some further reading materials would be great :)

    • @aadilansari5997
      @aadilansari5997 2 года назад +1

      This is called proximal learning technique. Not too easy and not too difficult either. You are in the proximity of that border separating easy / difficult.

  • @goodplacetostop2973
    @goodplacetostop2973 2 года назад +38

    9:00 Really Good Place To Start
    36:35 Good Place to Stop

  • @erikdavis8901
    @erikdavis8901 2 года назад +40

    I am a PhD student in math (particularly Algebraic Number Theory) and I greatly appreciate videos such as these. However, I understand if they don’t feel worthwhile to make if they require some effort and if the audience for this is a very small minority of your viewers.
    I’d be up for seeing a follow up on the central extension of this algebra. Do you intend to make anything (or perhaps have you already made something) on representation theory?

    • @schweinmachtbree1013
      @schweinmachtbree1013 2 года назад +2

      Michael started a series on representation theory but sadly discontinued it due to low viewership

    • @mikhailmikhailov8781
      @mikhailmikhailov8781 2 года назад +1

      This video requires very low effort lol

  • @djsmeguk
    @djsmeguk 2 года назад +27

    I would love to see a follow up on the virasoro algebra.

  • @ericvazquez8639
    @ericvazquez8639 2 года назад +16

    As a student applying to PhD programs, videos like this help keep me motivated to learn mathematics. I would definitely enjoy watching more of these videos

  • @woody442
    @woody442 2 года назад +37

    I love abstract and pure mathematics and your extraordinary clean presentation makes even complex topics accessible by rather short videos. I appreciate whatever you do!

  • @romajimamulo
    @romajimamulo 2 года назад +12

    Often I, and probably many other people, are afraid they're not going to understand a video like this, but I was pleasantly surprised with how well I understood. Definitely interested in a sequel to this, particularly one about showing if there's linearity with the lie operator here

  • @user-fh5rm2ef4n
    @user-fh5rm2ef4n 2 года назад +10

    More video like this. I really like it.

  • @maxdominate2481
    @maxdominate2481 2 года назад +16

    One of my professors specialties, if I recall his CV correctly, was on "Witt Rings". My undergrad education didn't cover this type of Algebraic structure; so, thank you for covering it. I

    • @ChronusZed
      @ChronusZed 2 года назад +2

      I think Witt rings are actually unrelated to the Witt algebra (mathematicians are horrible at naming things...). Witt rings come from number theory, and they're always commutative rings (whereas the Witt algebra isn't even associative). I think the name relation is just because they were both first thoroughly studied by the same person.

  • @thomasreid2609
    @thomasreid2609 2 года назад +6

    As a maths graduate who is now navigating life outside of academia, I just wanted to say I really appreciate these kinds of videos for keeping me in touch with my passion for mathematics. Thank you so much!

  • @captainsnake8515
    @captainsnake8515 2 года назад +10

    I really like these videos! There’s very few high quality introductory materials to advanced math concepts on the internet. For those of us who aren’t currently at a college (say working in industry or still in high school) this type of content is invaluable. Please do make a follow-up video!

  • @bobdowling6932
    @bobdowling6932 2 года назад +4

    You ought to mention whether it satisfies the Jacobi identity. And is there a reason why there is a minus sign in the basis definition? Does it make some future calculation neater?
    And in answer to your question t the end, I would like to see a follow-up video on the Virasoro algebra.

  • @radadadadee
    @radadadadee 2 года назад +8

    I learned a bit about Lie algebras when studying Quantum Field Theory but this was a nice refreshment. I would like to see a continuation into the Virasoro theorem.

  • @TheOneThreeSeven
    @TheOneThreeSeven 2 года назад +10

    Love these more advanced/theoretical video's, more like this please!

  • @patrickcrehan355
    @patrickcrehan355 2 года назад +2

    Many thanks for that. It is a very clear exposition and I would love to see a follow up on the Virasoro algebra

  • @aspiringmathmatologer3445
    @aspiringmathmatologer3445 2 года назад +6

    It’s a shame the audience for these kinds of videos is so small. As a student who’s self-studying linear algebra and recently learnt about some simpler applications of polynomial rings like Gaussian numbers to number theory, these sorts of videos that give exposure to neat things in math really pique my interest for the possibilities of what I could study in college. Thank you so much!

  • @dansheppard2965
    @dansheppard2965 2 года назад +6

    This kind of video is cool. Please post more like this! I actually found it easier to follow than a lot of the tricksy Olympiad type problems: more concept heavy, sure, but more interesting and less like some kind of newspaper puzzle.

  • @aryanrahbari1411
    @aryanrahbari1411 2 года назад +6

    I would highly appreciate a sequel about Virasoro algebras!

  • @evanknowles4780
    @evanknowles4780 2 года назад +4

    All of this can be derived just from linearity and the product rule?! I'm 10 minutes in and already blown away. Please make more videos like this!

  • @ttausend1106
    @ttausend1106 2 года назад +6

    I believe in minute 34:40 you forgot to pull the - sign in front of the (m-n) into the L_{m+n}, since the L_m elements were defined with a negative sign. And I personally would love a follow up, it sounds really interesting.

  • @m1323fj
    @m1323fj 2 года назад +2

    This is a great video on a topic I really enjoyed learning about. Please make the follow up video on the virasaro algebra. I am really interested on how this math applies to the physical applications that you mentioned at the end of the video. More on these topics please.

  • @YanickSP
    @YanickSP 2 года назад +2

    Yes please! Give me more! Love this!

  • @paulkohl9267
    @paulkohl9267 2 года назад +21

    I like elaborate integral videos; but getting a video on more abstract topics like this is also very much appreciated. Too bad the numbers are so low. There are those of us in the small minority who exist and can follow along. For those brave few, we warrant your all of videos as enjoyable. 🙂

  • @officiallyaninja
    @officiallyaninja 2 года назад +3

    I love videos like this. I'm only a first year undergrad but I could follow along pretty easily, I don't know if there's a big audience for it but those of us who did like it seem to like it a lot. myself included

  • @zuzaaa1998
    @zuzaaa1998 2 года назад +4

    I love your advanced videos. They are definitely filling some gaps in RUclips materials. Also your advanced videos are especially useful for me because my university doesn't offer much algebraic topics and your videos show me this beautiful branch of Maths that I know nothing about. But you also keep your videos on such a level that they are understandable for viewers that do not have much algebraic knowledge but have some maths intuitions.

  • @Jacob-ky4vk
    @Jacob-ky4vk 2 года назад +2

    I would absolutely love a follow-up on the Virasoro algebra!

  • @TimDuncanofSoccer
    @TimDuncanofSoccer 2 года назад +6

    This is fantastic. I'd be very curious to see the Virasoro algebra stuff.

  • @andrewmichel2525
    @andrewmichel2525 2 года назад +2

    I think you underestimate how much interest there is for these type of videos. There are tons of channels that do challenging integrals and Olympiad problems, which are fun, but that niche is definitely filled. There aren't that many channels presenting this type of higher level material with such high production value while still being digestible to people with less mathematical experience (such as myself). I would definitely like to see sequel to this video and really wouldn't mind at all if you steered your channel more into the realm of your mathematical interests and research. It's your channel, do what you want and I'm sure many of us will support you.

  • @greivinalfaro8339
    @greivinalfaro8339 2 года назад +3

    I stand for this kind of content!

  • @rishilohar2114
    @rishilohar2114 2 года назад +4

    Loved the clarity of your explanation. I’d also really like more content on how algebras like this relate to physics, particularly quantum mechanics.

  • @murmol444
    @murmol444 2 года назад +1

    I have a PhD in discrete math and this type of video is great to watch during breakfast. Learn a new definition, see some trivial stuff (until about 25:00), learn something a little less trivial. And learning about applications of Witt algebra would be great, even though it sounds much more challenging video than this one

  • @EtienneSturm1
    @EtienneSturm1 2 года назад +2

    yes, please more of those. Great addition to the usual math contests!

  • @josephmellor7641
    @josephmellor7641 2 года назад +2

    9:00 "That's a good place to start." I feel like I'm in a mirror universe.

  • @arthursteenkist2595
    @arthursteenkist2595 2 года назад +1

    I also like these more advanced topics. The explanation is so clear that it's easy to follow. Highly interesting stuff!

  • @iconoclasticistherr9965
    @iconoclasticistherr9965 2 года назад +1

    Very fun! I study related stuff for a living but still enjoyed your exposition. Would love to see the Virasoro algebra followup.

  • @leandrocarg
    @leandrocarg 2 года назад +1

    Yes and yes! More videos on abstract/niche math, and more videos following up to this one. 🙏🏻

  • @lukasschmitz9030
    @lukasschmitz9030 2 года назад +3

    I'd love to see a follow up with the Virasoro algebra!

  • @dcqin
    @dcqin 2 года назад +3

    I like your videos on topics like this. I find you to be an extremely clear orator, especially for more "abstract" topics. For example, your videos on the tensor product and free vector spaces were extremely helpful for understanding those objects.

  • @SlipperyTeeth
    @SlipperyTeeth 2 года назад +5

    I enjoy your usual videos, but this is the stuff I'm really here for! I'm sorry they don't get as many views, because they really are great.
    I would love to here you talk more about the Virasoro Algebra!

  • @kiga14
    @kiga14 2 года назад +1

    More videos like this, please! I had encountered the Witt algebra from loops of S^1 but this finally filled in the gaps for me. Thank you!

  • @mohanbuvan
    @mohanbuvan 2 года назад +1

    Thank you . Of course there is an audience to know the difficult and different areas of maths. Pls keep on doing your good job.

  • @dimalukashov8148
    @dimalukashov8148 2 года назад +4

    I really enjoy these videos about more complicated topics and definitely would like to see more. Thanks for your content.

  • @mictecacihuat665
    @mictecacihuat665 2 года назад +1

    I took a mathematical methods class last semester were we used Laurent polynomials a lot for complex integration. This video showed me another perspective of them that I hadn’t seen before, and that’s pretty cool.

  • @sp_danger1729
    @sp_danger1729 2 года назад +2

    I would love to see some more of these in depth videos into abstract topics. You Michael would probably enjoy making them too.

  • @beatrizbrandaor8
    @beatrizbrandaor8 2 года назад +3

    Yes! I would appreciate more videos like this one!

  • @alexnagle575
    @alexnagle575 2 года назад +1

    You remind me of a professor I had at UofM who taught a 1-credit (honors) course in simply solving problems. I thought it was silly and dropped it, and you are making up for the presumptive ignorance I had in my late teens. Cheers.

  • @harmindersandhu2750
    @harmindersandhu2750 2 года назад +1

    I greatly appreciate yours videos and thank you for making them. As for the 'Virasoro Algebra' video, I would certainly appreciate it and encourage you to make it.
    Thanks again for making all the videos.

  • @masonholcombe3327
    @masonholcombe3327 2 года назад +3

    I'm currently an undergraduate mathematics major, so these topics are a little above my head but provide challenging math, which is always appreciated!

  • @renpnal229
    @renpnal229 2 года назад +3

    These kinds of videos are something I'd want to see more of on your channel so please make more videos like this!

  • @heygooooooooo
    @heygooooooooo 2 года назад +1

    Much more abstract than I learned in engineering - but you presented it really clearly! I definitely wouldn't mind watching abstract stuff like this.

  • @notfeelin6610
    @notfeelin6610 2 года назад +1

    this sort of stuff is what i am interested in tbh. i would definitely appreciate a follow up or something similarly abstract in the future.

  • @jaykazmi
    @jaykazmi 2 года назад +1

    PLEASE MAKE MORE VIDEOES LIKE THESE!!!! Trust me there's a huge demand

  • @alepel792
    @alepel792 2 года назад +1

    Loved studying math in undergrad but needed $$ so switched to data science but I love running into content like this. Makes me want to go back to math

  • @valeriobertoncello1809
    @valeriobertoncello1809 2 года назад +3

    What do you mean there's no audience?? THIS is the content I'm subscribed for!

  • @ivanklimov7078
    @ivanklimov7078 2 года назад +1

    one of the best videos on this channel so far. i'm on my 3rd year of uni learning physics and just started learning complex analysis, so this was fascinating. would love to see a followup video and more videos like this in general

  • @BrutishLearner4
    @BrutishLearner4 2 года назад +1

    This really takes me back to my bachelors studies into mathematical physics as you mention in the end of the video :)
    I would love to see more abstract algebra content like this from time to time. This was really great!

  • @nossahalf119
    @nossahalf119 2 года назад +2

    This video was amazing. I'd love to see a continuation on this, I'm a theoretical physics PhD student and I'm super enthusiastic about mathematical physics, although I lack some formal introductions on advanced math (such as rings, topology and so on), so this kind o video reeeeeally gets me going, so I can be able to look out for more topics to study. Thank you!!

  • @driesceuppens7623
    @driesceuppens7623 2 года назад +2

    I love the more theoretical math videos. This was a great watch!

  • @gropius6070
    @gropius6070 2 года назад +1

    More advanced content like this, please. Onward and upward to the Virasoro Algebra indeed!

  • @charlottedarroch
    @charlottedarroch 2 года назад +1

    I would definitely like to see more abstract algebra topics like this. Especially the Virasoro algebra and more videos on vertex operator algebras and their orbifolds. I watched the previous videos on those topics, but I lacked familiarity with the graded structure of the vector spaces therein, so I'd love to see more on that

  • @lorentzianmanifold718
    @lorentzianmanifold718 2 года назад

    Please keep these coming because they help when your studying this stuff from a textbook to get a good understanding of the subject so the really difficult material in my texts is more digestible!
    Thank you!!!!!

  • @johnsalkeld1088
    @johnsalkeld1088 2 года назад +3

    Hi Michael - love the content and especially this type - noticed the derivation and was reminded of Fox differential calculus on groups with finite representations the derivation is on a possibly non communicative ring algebra rather than a polynomial ring - and so the derivation is into an ideal and the ideal being one sided requires a triviality adjustment to the derivation definition. It is very interesting and certain invariants emerge as the principle ideal component of the ideals generated. It is worth looking fox up - i think and it allows derivations of discrete group elements g -> g-1 - worth looking at (the Alexander polynomial for knots can emerge this way)

  • @daveaasen
    @daveaasen 2 года назад +2

    Make more videos like this! They are awesome.

  • @jewishjewom12ify
    @jewishjewom12ify 2 года назад +2

    I would love to see more algebra stuff! I’m a second year grad student with a background in analysis. My advisor does stuff in harmonic analysis on groups, so I have been trying to learn Lie algebra and representation theory stuff, which has been brutal.

  • @francoisamman2620
    @francoisamman2620 2 года назад +1

    I would definitely enjoy watching more of these videos!

  • @kushaldey3003
    @kushaldey3003 2 года назад +1

    I think this type of topics should be explored more by everyone.

  • @danielwilckens578
    @danielwilckens578 2 года назад

    Follow up video about Virasoro Algebra would be a must watch. Thanks for the great content.

  • @robertozanconato4992
    @robertozanconato4992 Год назад

    Please keep making these videos. They are challenging but very rewarding.

  • @scipionedelferro
    @scipionedelferro 2 года назад

    Absolutely More algebra and video like this one!! You're so gifted in explaining complex concepts, that's why the web was invented, to spread the knowledge beyond physical libraries or classrooms

  • @Budha3773
    @Budha3773 2 года назад +1

    This video was great, please make more on topics like this one.

  • @charmetroldendk
    @charmetroldendk 2 года назад +1

    I would love for you to explain where the extension actually comes from and what it even is!

  • @mMaximus56789
    @mMaximus56789 2 года назад +1

    I would love to see a follow up. I also think that as long as there's a buildup there'll be an audience (I certainly enjoy these videos). If you'd like to continue showcasing more complicated algebras I'd like to propose Clifford\Geometric algebra and maybe buildup till geometric calculus as I haven't seen an easy introduction to the calculus part yet in the internet; plus it's heavely used in physics and computer graphics!

  • @AdrianBoyko
    @AdrianBoyko 2 года назад

    I learned so much from this video. It inspired me to run down a number of tangential rabbit holes. I’d certainly appreciate more like this!

  • @matthewsalvas4538
    @matthewsalvas4538 2 года назад +1

    Make more of these! The tensor product video was very nice

  • @andreben6224
    @andreben6224 2 года назад +2

    I am super excited by these more abstract and higher algebra videos !!!
    I'd be super pumped if you do a follow-up on the Virasoro algebra. It sounds super interesting ^_^
    If you ever have any ideas for representation theory in positive characteristic I'd be incredibly grateful too XP

  • @PixelSergey
    @PixelSergey 2 года назад

    This was super interesting! Despite only having a high school background in maths and an interest in abstract algebra, I was able to understand almost everything; very clear explanation

  • @jrb0580
    @jrb0580 25 дней назад

    I loved this video! I would like to see stuff like this about Clifford Algebras and Geometric Algebra in particular.

  • @buxeessingh2571
    @buxeessingh2571 2 года назад +1

    This is a great topic. Thanks for the video. I love these advanced videos.

  • @riccardofiori828
    @riccardofiori828 2 года назад

    This video is GREAT!
    You take a topic i didn't know anything about and just using a bit of linear algebra you give a lot of interesting ideas, in just half an hour!
    Also really smooth to follow.

  • @robertschlesinger1342
    @robertschlesinger1342 2 года назад +1

    Excellent video. Very interesting, informative and worthwhile video. I hope you make sequel videos and other videos on similar topics.

  • @erik9671
    @erik9671 2 года назад

    I barely understand half of what is happening in these complex videos because this is way out of my league, but I genuinely enjoy watching them.

  • @Holital
    @Holital 2 года назад +2

    Love it!!! Yes to follow up

  • @cebiclock
    @cebiclock 2 года назад +2

    please do more videos like this one!!!

  • @AdrienLegendre
    @AdrienLegendre 2 года назад

    This is great. I encountered Viasoro algebra on reading String theory, this provides a nice context. Videos of this type are appreciated as I know there is a lot of work. Thanks

  • @MichaelMavros
    @MichaelMavros 2 года назад +1

    I would love to see more videos like this!

  • @jamesquinn4467
    @jamesquinn4467 Год назад

    This is the best video I have probably ever watched. I legit want to quit my job and just sit in your classes all day

  • @statisticserinokripperino
    @statisticserinokripperino 2 года назад +1

    Please, make more of these!!!

  • @uhbayhue
    @uhbayhue 2 года назад +1

    I love the recent content you've been putting out. It's a nice refresher from your usual content around solving problems. (And I'm learning about Lie algebras, representations, etc. right now so the timing is perfect!)

  • @jqveenstra2160
    @jqveenstra2160 2 года назад

    A lecture in an area I haven't touched for a long time. Lovely.

  • @prateekpani9464
    @prateekpani9464 2 года назад +2

    (Witt)y guy. Btw keep these concepts coming. Love the way you break it down.

  • @adeelanwar4819
    @adeelanwar4819 2 года назад +2

    I learned the derivations on a modules for my master's thesis.so it was enlightening to watch this topic.
    anyways I love this type of video, so please keep making them.

  • @ethandole2218
    @ethandole2218 2 года назад +1

    I would love more stuff like this!!

  • @jordanweir7187
    @jordanweir7187 2 года назад +1

    That moment when the 2nd derivative isn't in the algebra, came out of nowhere, really nice stuff

  • @thefourthbrotherkaramazov245
    @thefourthbrotherkaramazov245 2 года назад

    Watching to haze myself with confusion. Good introduction to the feeling you get from seminars.

  • @MichaelFJ1969
    @MichaelFJ1969 2 года назад +1

    I would love to hear more about the connection with the Hamiltonian operator. I remember at university looking a bit into symplectic algebras. Would be nice to hear more about that too.