Fields Medal winner Cedric Villani explains the many mysteries of Pi • RFI English
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- Опубликовано: 6 фев 2025
- March 14 is celebrated as Pi day every year. The date 3/14, corresponds to the first three digits of the famous mathematical constant. According to Fields medal winner Cédric Villani, IHES-Université de Lyon Chair in Analysis, pi is an emblematic number and a key cornerstone in many subjects of mathematics.
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It's also remarkable that the video length = 2pi
And 2pi (also known as tau) was almost used as the constant. It was by chance that pi = 3.14... and not 6.28... If you think about it, it would make much more sense for pi to be equal to 6.28. In this scenario, C = R*pi', and not C = R*2*pi. It would be more elegant.
OMG! that's too funny!
@@yanfranca8382 On the other hand when using the diameter instead of the radius the circumference is just d*pi. That is good for practical work since measuring the diameter is easier than measuring the radius.
😂😂😂😂😂😂
I could listen to this Professor speak about maths all day long. Very charismatic,
He’s the proud of our country in France, he’s very famous for having won the title of “Médaillé Field » in 2010 which is incredible, he studied maths in the best schools of France and got many diplomas, I would so much like to meet him !
Cedric is always worth hearing. Remarkable man 👍
You can tell that he really loves his work.
Yes clear as day.
He writes on board elegantly
Probably has hagoromo chalk
Didn't get that far. Hand gestures already too annoying.
I thought the same
mathematicians are naturally drawn to such elegance.
that circle he draws -- counter clockwise -- at 1:15 is exquisite ... and extra style points for that large, rich blue "tie" he's wearing
Prof. Villani's Explanation of pi is the best one I have encountered even for a non-math expert like me. Thank you Professor.
Fiers d’avoir Cédric Villani en France ! Quel mathématicien d’exception !
I'm a simple learner ... I see prof. Villani, i watch the video 'til the end
Absolutely
Isn’t he the dude that got the medal for a result on the fluid equation? I read his book on it and it was a very interesting read.
How can you not love this guy.
I dont
dresses like a low self awareness dork
@@jcjc5702 😆😆😆
@@jcjc5702then you don’t like him. Smart for sure..
@@jcjc5702He’s a dork who has won the Field Medal. I think that gives him the right to dress any way he wants. Besides his enthusiasm for talking about mathematics is terrific.
@@jcjc5702you comment like a low emotional intelligence dork
Excellent ! Congratulations for the Fields medal.
Love this guy. So brilliant yet relatable.
The length of the video is 2π
Amazing 😂
Please explain
Actually not, despite the fact that 2π equals 6.28 the whereas the video is 6:29. Hence, it can not be approximated to 6.29. However, the length of the video is 6:29 and not 6.29, as it is shows a relative notation of time but with 2 different unit of measurement, have a nice day!
@@g57r42Actually, you may have been misinformed. The actual length of the video is 6.28, which is a multiple of π's approximation. Have a great week!
Wow
Love this explanation of Pi. Professor Cedric Villani is my favorite mathematician.
He talks with such passion, I love him ❤❤❤
Perfect! Video is 6:28 long!
Yep, fully circled!
First thing I’ve noticed, even though for some reason it reads 6:29 here.
Thank you Prof. Villani
Thank you for that !.. We love you guys !
humble guy
Very clearly explained and with a lot of enthusiasm.
Fascinating! What an answer to a simple question. Thank you.
I love his enthusiasm and would love to take a course (any mathematics course) from him!
What a delightful class about pi!
To anyone out there who doesn't already own a copy, I would recommend Cedric's book, "Birth of a Theorem." One of the most exciting and inspiring mathematical reads I've come across. (And he looks particularly dashing on the cover, too!) Quite a guy. 👍
The integral of the Cauchy Distribution f(x) = 1/(1 + x^2) also evaluates to pi, when integrated from minus infinity to plus infinity.
😮
well that certainly put a smile on my face
thanks for the video
this guy is fantastic
Why does everyone forget that Euler’s identity also uses the four basic operators: addition, multiplication, exponentiation, and equality?
This video is about pi, not about Eulers identity.
Who forgot? It's not about operators.
exponential and multiplication operators are shorthand forms of addition
@@amar-ali6065 LOL ;)
maybe because multiplication and exponentiations are not basic, they are just addition
Excellent, I appreciate His initiative feeling regarding that Five appearing in that.
There is some limitations to explain this through Language even though the Professor trieying for some thing to understand that 👍
I like how the Frenchman holds the chalk like a cigarette 😆
this dude is my inspiration
Wow, I really love to listen about mathematics Couse I understand the way how he teach
I am sure people got lost the first second he tried to explain 2*pi*r but his r looks exactly like a pi
Pi is irrational, transcendental, universal, emblematic constant and the equation that relates the constants 0,1,pi,e and i is really fascinating as it relates constants with different historical background. Mathematicians do mathematics primarily for its beauty and not for the applications their works may have, as do painters, musicians and other artists.
Mathematicians have as many reasons for doing their subject as any other subject, including money.
He is good I wud like to listen to him next time 😊
I love this guy.
Love you man❤
Excellent.
I'm electronic engineer, and during my career (early years) always wonder if the PI (treated as a constant) appearing in tons of formulae (also in statistics), with its original meaning attached to euclidean geometry affected those formulae in non euclidean geometries, are those formulae still valid with the value of PI as the constant (3.14159...)?
I like the way of writing 1 of Europeans that is the real 1 , not like Americans that write it like a letter l, it doesn't make sense really
Я по физике во французском заочном лицее Авангард учился. Спасибо)
Every scientist should be this charismatic
Excellent video.
The key thing I learned from this video is that I could have just been using 22/7 all these years. It's close. Pi is 99.95% of 22/7.
Very cool style.
Seems like a very gifted fellow, he has a nice old-fashioned style. Mathematics is a state of mind and it improves the spirit. Its sad though to see the dark side of the mathematical community. The solver of the Poincare Conjecture, Gregori Perelman, left the community because he was so upset with them. There is a tendency for it to reject the non-mainstream type of person and ignore their work - then that work could be represented later in someone else's name - that's not nice. Perelman refused a $1million prize as he acknowledged the other mathematicians' contribution to his work. I came up with a new proof of an old mathematical theorem and was told any maths class could "sit down" and be given that problem and solve it easily - so you have 6 existing proofs, presented in an academic paper from a major university, so now come up with a 7th. So a maths class could just "sit down" and do that at the teacher's request? I'm not so sure about that. That's the kind of attitudes you are up against. You shout Eureka! and they just want to clobber you. But fair enough Cedric seems to be a damned good mathematician, good luck to him, he has been given a gift. Always remember to be thankful for what we receive. Everybody wants sex and money but what we give is an important thing too. 43653
1:16
Quelle est la différence entre un cercle et un cercle parfait ?
Thanks
this how genius looks like :)
Great guy
3 Blue 1 Brown just did a video on why Pi is in e^(-x^2).
Un homme remarquable
So interesting.
Although rough in facial appearance, he dresses like a distinct gentleman … ❤
π also appears in the probability density function of the normal distribution.
Yeah, he showed that with the integral.
it's not possible for 2.7 raised to any power to be less than 0 so how can e raised to ipie be -1?
e^{pi*i} = -1. The number e is not raised to a real number. i = sqrt{-1} which is not a real number.
@@Andrew-kf4qp Artificial
All of this using base 10
Maths with base 16 instead, where Pi is an full number are very interesting.
Never knew Jordan Schlansky was a secret mathematician
Thank you for this video.
When you're talking about PI, please do not write 'r' like 77 (like pi)
Please.
From the explanation and all the examples, I got the feeling that pi has a characteristic of something "full circle" with "infinity inside it".
3:09 "1 - 1/3 + 1/5 ... eventually it will end up being something like pi/4": something LIKE pi/4 lol!
He loves his job
А я как-то также нарисовал несколько разных таких кругов и увидел что пи разное!)
Is there world e day ? e is also very interesting number.
Sehr gut
Pi is not constant because if you measure various pipes use around the home then it prove that pipe is not constant but change with size of radius
Amazing to listen to,however I didn’t understand a word he said never mind getting the concept. But still fascinating to listen to these ideas.
wow....his love for pi is like pi it self...everblasting....
I envy all math geniuses.
Firstly thought it’s longhair Savateev😂
PI is an old Egyptian invention.
If you divide the circumference of the base of the pyramid by its height the result is 2 pi
Im 51 and born on March 14th. Why have I just heard that it is PI day?
It’s all in the tie.
This video made me eat humble pi.
Wow - he looks just like Mr Perelman :DD
I don’t think it’s possible to prove that a perfect circle, a perfect sphere exists where the radius must therefore be of equal length at every point. There must be some degree of imperfections within everything. Infinity is the reason why.
I would love to take a class taught by him.
Misleading title: there are no mysteries about pi. All these formulas can be shown to be related so a circle.
He speaks with a lot of enthusiasm, but in truth the material he covers here is just standard stuff that is covered in countless RUclips videos and in standard math classes at, say, introductory college level.
It’s a news segment
Of course, but this video is for general public.
Yea because he is not giving a lecture here. The interviewer probably already told him that this will only be a short interview and he provided good information for the average guy who is not much aware of pi
A genius should also be able to explain the basics, without diverging into complex but obscure details to show off how smart he really is.
"mysteryes fo Pi" my god...
pi number is magic number.
For me, it proves Jesus exists.
How is this?
@@MADBurrus All this maths stuff and how it all fits together can’t possibly be just chance, to think so is absurd.
Do you not think so?
@@boywonder6659 oh it is all math….just not the math this guy is talking about…he is just making videos of anomalies that a hundred other men in history have all ready discovered… the real math is not going to be on RUclips my friend
The nature of π is TOPOLOGICAL.
Pi is also very delicious.
Ramanujan had a formuls giving the particular decimal place value of pi
He only won because he’s cute.
length is 2pi)
his face is also similar to Pi
1:14
Mathematicians > If this a circle
Physicians >its a ring 👽👽
Pi is a signature of Allah creator of the seen and the unseen
i thought he was Jordan Schlansky😂
He should have talked for longer.
Esse assunto, é a tarefa de casa que o professor de Leibniz lhe deu 1no infinito = 2
لحد نصد الفديو كنت فاهم وراهة تاهة الامور مني 😐
Is this the new math?
No, its basic math.
The vampire mathematician.
At thé beg we laughed lot aboutthe fameuse Pi:3,14 from where?
Even if Givenchy premium
Prof you are wrong. Zero, 0 is not a number for nothing or denoting nothing. 0 is also a tangible quantity eg. 10, 10001 etc.
I ate 0 pies, now I'm full
I have an Idea about this nember..si i think there IS one direction un Coran for Muslims..that god Saïd...thé two sea meet eatchother but non mix
now he looks a bit like Perelman.
Hi