PI MUST DIE !!!

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  • čas přidán 10. 03. 2016
  • Just in time for Pi Day the Mathologer and a couple of his Taekwondo friends set out to kill Pi one digit at a time. Featuring some of the best pi t-shirts ever, clips from famous pi movies and the worlds only (?) pi black b...
    Enjoy!

Komentáře • 932

  • @randfur
    @randfur Před 8 lety +492

    I thought this was going to be about Tau.

    • @KarstenJohansson
      @KarstenJohansson Před 8 lety +7

      +randfur Wait 'til summer.

    • @Frooxius
      @Frooxius Před 8 lety +2

      +randfur Same here :D

    • @vwlz8637
      @vwlz8637 Před 8 lety +3

      +randfur PI IS LIFE

    • @harryiscool9619
      @harryiscool9619 Před 7 lety

      Frooxius ppppppoooooooool

    • @mkb6418
      @mkb6418 Před 7 lety +6

      I should. π must die and give its kingship to the rightful own τ.

  • @DekuStickGamer
    @DekuStickGamer Před 8 lety +60

    *From this day forward, I will forever remember that you can be good at maths and still be a BADASS.*

  • @Mathologer
    @Mathologer  Před 8 lety +163

    For all tau fans roaming this comments section. Did you ever read Bob Palais's original article: www.math.utah.edu/~palais/pi.pdf ? There is one passage that refers to us trying to communicate with aliens by beaming the digits of pi into space which I like a lot: " What really worries me is that the first thing we broadcast to the cosmos to demonstrate our "intelligence," is 3.14... I am a bit concerned about what the lifeforms who receive it will do after they stop laughing at creatures who must rarely question orthodoxy,. Since it is transmitted in binary , we can hope that they overlook what becomes merely a bit shift!"

    • @Mathologer
      @Mathologer  Před 8 lety +5

      +Eliseo Palit-Ang Correct :)

    • @evilcam
      @evilcam Před 8 lety +4

      +Mathologer
      That was actually an interesting read. That article is where the controversy first came from? The one that started it all?

    • @Mathologer
      @Mathologer  Před 8 lety +4

      That's the one :)

    • @qedqubit
      @qedqubit Před 8 lety +3

      +Mathologer i found that article years ago , looking for 'pi is wrong', because i thought :'energy is radiation',
      not 'diametration',
      But it seems physicists don't even xpect a purely mathematical universe ? why not ?

    • @NoriMori1992
      @NoriMori1992 Před 8 lety +10

      I would tell him that I'm pretty sure the purpose of transmitting pi is to demonstrate our intelligence as in "this isn't a random blip from a cosmic ray burst or something; this is a deliberate signal from a sapient species". Not intelligence as in "look how smart I am for figuring out an irrational number!"

  • @davidjames9935
    @davidjames9935 Před 7 lety +56

    Error at 5:32. Pi is shown as being approximated as 355/133 but that should be 355/113.

  • @flmbray
    @flmbray Před 8 lety +48

    Why don't we just beam π in base π? That will really save on the amount of energy needed to send it.

    • @Mathologer
      @Mathologer  Před 8 lety +18

      +Michael Bray Not sure it will save on energy and whether that's really a concern. But since you like tau you you'll like this one: Since pi and tau differ by a factor of 2 they have exactly the same digits in binary and this means that if we just beam this string of digits the aliens can interpret it both as pi and tau :)

    • @flmbray
      @flmbray Před 8 lety +8

      +Mathologer Of course it will save energy - it's only two digits long - 10. Sending the digits in base 10 would require infinite energy. I'm not sure I can make a good argument as to whether it's a concern or not. ;)

    • @Mathologer
      @Mathologer  Před 8 lety +14

      Oh, sorry did not read your original comment properly. Somehow read it as pi in base 2 :)

    • @groszak1
      @groszak1 Před 7 lety +3

      what is pi+4 in any base

    • @helloitsme7553
      @helloitsme7553 Před 2 lety +2

      A non-integer base doesn't really make sense since it either means some numbers cannot be written (even if we assume we can write countably infinite characters), or there are too many ways to write the same number

  • @huitv1
    @huitv1 Před 8 lety +58

    its a black mobius karate belt of pie with over 9000 digits that can wrap around twice of it length and allows to warp into 4th geometrical dimension.

  • @Mathologer
    @Mathologer  Před 8 lety +26

    If you are interested in the weird integral on one of my t-shirts that gives the difference between 22/7 and pi have a look at this wiki page.
    en.wikipedia.org/wiki/Proof_that_22/7_exceeds_π

    • @afm4711
      @afm4711 Před 8 lety +6

      +Mathologer unfortunately, the formula on the whiteboard is different from the formula on the shirt: the denominator is 1+x^4 on the whiteboard, but should be 1+x^2 as on the shirt.

    • @Mathologer
      @Mathologer  Před 8 lety +6

      +Andreas Müller Unfortunately that is true :)

    • @clumsyjester459
      @clumsyjester459 Před 7 lety

      Now if only our days had 22 hours, then this integral would basically mean "life without pi". And those silly Romans spoiled the joke, by arbitrarily dividing the day into 24 equal parts.

    • @PanozGTR2
      @PanozGTR2 Před 7 lety

      Just switch to base 11, problem solved!

    • @Chris-5318
      @Chris-5318 Před 7 lety

      But then 22/7 (base 10) would be 20/7 (base 11). Your call ;)

  • @loqiloqi
    @loqiloqi Před 8 lety +44

    2π ≥ π
    mildly opinionated t-shirt

  • @BenRickProductions
    @BenRickProductions Před 7 lety +13

    The belt contained 263 digits of pi exactly. The last few digits on the belt are 69234

  • @Cubeazza
    @Cubeazza Před 8 lety +79

    Oh lol thought you where gonna talk about tau. Opinions on it?

    • @Mathologer
      @Mathologer  Před 8 lety +56

      +Cubeazza Tau will have to wait its (another half) turn :)

    • @Cubeazza
      @Cubeazza Před 8 lety +3

      Mathologer Hehehe

    • @MrSzybciutki
      @MrSzybciutki Před 8 lety +3

      +Mathologer I'd also like to hear your opinion on tau! Is it really as great as it sounds? Does it have a chance to replace Pi? How would it affect math didactic? If it really managed to replace Pi, how confusing would it be to use "old" books which might contain tau in a different meaning and the "old" Pi? So many questions...
      Anyway, I'm a big fan of the whole tau idea :)

    • @Ronni3no2
      @Ronni3no2 Před 7 lety +9

      2Pi is the correct constant but Tau is a stupid choice of notation because it is already used in various contexts along with Pi: time, torsion, torque, tau particle, tau function, various complex numbers etc. It would be too confusing. It will not catch on.

    • @robertdarcy6210
      @robertdarcy6210 Před 5 lety +2

      @@Ronni3no2 this is dealt with in section 4 of the Tau manifesto

  • @branthebrave
    @branthebrave Před 8 lety +25

    It fits around you 3.14 times.

    • @Fabbbyori
      @Fabbbyori Před 6 lety +1

      I think, pi times

    • @PC_Simo
      @PC_Simo Před dnem

      @@Fabbbyori So do I 😅.

  • @jamesbeanmachine857
    @jamesbeanmachine857 Před 7 lety +3

    I see two reasons why using the decimal expansion of Pi to as a baseline to establish communications with extraterrestrials is a bad idea:
    1. It assumes that the message recipients use a base 10 number system, which is not necessarily the case.
    2. It assumes that the message recipients also use a half-turn circle constant, which is not necessarily the case.

  • @RecursiveTriforce
    @RecursiveTriforce Před 6 lety +9

    6:19 Who is noticing the copying mistake?
    His T-Shirt is right but the equation in the left is wrong.

  • @MichaelMorell
    @MichaelMorell Před 8 lety +17

    if you are french (or even canadian) and your name is "pierre", your could write your name in this beautiful way:
    πR

    • @Mathologer
      @Mathologer  Před 8 lety +8

      :)

    • @doktorwyvern2883
      @doktorwyvern2883 Před 6 lety +4

      What if I'm German and my name is Pierre?

    • @stevenvanhulle7242
      @stevenvanhulle7242 Před 5 lety +6

      Then you can't! Only French and Canadian! Not German, not French-speaking Belgian, and not Congolese. There's the law, you know!

    • @b.clarenc9517
      @b.clarenc9517 Před 5 lety +2

      - Présent !
      - πR ?
      - Présente !

    • @NuisanceMan
      @NuisanceMan Před 4 lety +1

      Monsieur Pierre au Carré, the area formula himself

  • @ryPish
    @ryPish Před 8 lety +38

    Tau makes the best kind of pie, the round and whole kind :3

    • @FreeFireFull
      @FreeFireFull Před 8 lety +1

      +Ry P
      Much preferable to Pi half-pies

    • @SkyFoxTale
      @SkyFoxTale Před 8 lety +1

      +Ry P But the area of my pi pie is exactly pi.

    • @SpaghettiToaster
      @SpaghettiToaster Před 8 lety +2

      +Freefle have u ever bitten into a whole round pie, that's terrible

    • @TrabberShir
      @TrabberShir Před 8 lety +1

      +SpaghettiToaster You lack experience with pie. The best pies are savory pies and most savory pies are tau pies about the size of the palm of a large hand. So biting into a whole round pie is delicious, not terrible.

    • @insidetrip101
      @insidetrip101 Před 8 lety +2

      +Trabber Shir
      I think I'll stick to the most simplified of pies.

  • @TheDannyHamilton
    @TheDannyHamilton Před 8 lety +7

    It was difficult to count, because you moved it so fast, but I think I counted approximately 263 digits on that belt (including the 3 at the beginning). If the average male waist is 0.9 meters, then the belt should fit around your waist between 3 and 3.5 times

  • @MrPictor
    @MrPictor Před 8 lety +4

    Congratulations for this many subscribers! A nice reward for all this hard work. Looking forward to view many more exciting videos... PS: I had never read about the 22/7-pi formula. I love it!

    • @tgwnn
      @tgwnn Před 8 lety +4

      +MrPictor wait til you hear about 355/113.

    • @Mathologer
      @Mathologer  Před 8 lety +4

      +tgwnn I good way to remember this fraction is 113355 :)

  • @sergioalejandrosalinasguem9091

    Amazing! As any of the Mathologer's videos. This is by far my favorite channel on CZcams. Thanks!!

  • @shiffterCL
    @shiffterCL Před 8 lety +1

    I think the most significant use of pie digits today is testing the strength of your computer. The higher the digits your computer can count, the more powerful it is.

  • @McTofuwuerfel
    @McTofuwuerfel Před 7 lety +32

    Imagen approximating a circle with sticks. The circle should have the same diameter of the observable universe (about 46.5 billion light years or 4.40 × 10^26 meters). The sticks we are using all have the same length, namely that of a planck length (which is about 1.6 x 10^(-35) meters). Knowing that we can easily calculate after which digit it is of no more significance to us or anything else. So, (4.40 × 10^26) / (1.6 × 10^(-35)) = 2.75 × 10^61. This means, knowing more than 62 digits of pi (including the 3.) is completely useless.
    Just saying...
    And sorry for my bad English.^^
    EDIT: The belt has exactly 262 digits. Looked it up on that page you referred us to. ;)

    • @secularmonk5176
      @secularmonk5176 Před 7 lety +6

      My thinking, exactly! I memorized only the first 66 digits, because this ends with a "0".
      Now I'm ready for anything the universe throws at me! ;-)

    • @klausolekristiansen2960
      @klausolekristiansen2960 Před 7 lety +1

      Pi is used for much else besides calculating the area of a circle.

    • @300373330
      @300373330 Před 7 lety +7

      yes it was used to torture schoolchildren until the calculator was invented

    • @CandidDate
      @CandidDate Před 7 lety +2

      The universe may be infinitely large, however.

    • @secularmonk5176
      @secularmonk5176 Před 7 lety +3

      CandidDate
      We don't have access to the infinite, however -- only what exists within our light cone. Thus, practical uses of pi only require dozens of digits in theory.

  • @greg55666
    @greg55666 Před 7 lety +8

    Have you read Contact (by Carl Sagan)? In the end they discover that some many thousands of digits out in pi, in base 11, there is a circle (a pattern of 1s and 0s that when put into a square form a circle). This was in the book considered a possible signature of God.

    • @Mathologer
      @Mathologer  Před 7 lety +2

      I did watch the movie but never read the book. Having said that someone did told me about the pi reference before :)

    • @KuK137
      @KuK137 Před 7 lety +6

      Which was sadly brain fart on the author's part since Pi is infinite. In infinite number, EVERYTHING will happen if you look long enough. Numbers forming circle, square, star, hell, even Donald Trump's signature, when you have infinitely long sequence, it's there.
      It was even doubly dumb because to form anything, say that circle, you had to have a set display width, say 50 digits. Then repeating rows will indeed show a picture. But it only works for 50 digits wide display, make it 49 digits wide, just 2% difference, and your circle is suddenly gone. 'God' that makes 'signature' that will never show up aside for a very narrow band of starting variables is well, kind of dumb.

    • @greg55666
      @greg55666 Před 7 lety +1

      +KuK137 I thought the same thing about the second thing you say--it's going to be a really jagged, ASCII-art version of a circle.
      But I have a question regarding your first point. I have always thought the same thing you just said . . . until you said it, and now it strikes me as possibly wrong. Here is a decimal number that is irrational, but will never form a circle in base 11:
      0.123112233111222333111122223333111112222233333.....
      Does "irrational" really mean "every possibility"? That is the conventional wisdom, but is it true? What if an infinite number of monkeys all have a genetic mutation that makes them hardly ever type the letter A? They would still come up with an infinite number of variations, but not ALL variations.
      Mythologer, what about this? What is it I am describing? "Infinite" does not mean smooth or evenly distributed? There are infinities with holes, say, the cantor set? Something like that?
      Ah, I know this is true--just look at all the work being done on prime numbers. They think there are always prime pairs, but it had to be PROVEN--it is not necessarily true just from the infinite nature of primes. This is an interesting topic!
      Long live Carl Sagan!

    • @brewbrewbrewthedeck4138
      @brewbrewbrewthedeck4138 Před 6 lety +1

      What nonsense, KuK.

  • @CaesarsSalad
    @CaesarsSalad Před 8 lety +13

    It would be very embarrassing to use pi to communicate with aliens. They would ask us "why aren't you using Tau? Are you stupid?"

    • @windowslogo3577
      @windowslogo3577 Před 8 lety +1

      Why would anyone do it?

    • @pi8557
      @pi8557 Před 8 lety +5

      Dude. Chill.

    • @RedSunFX
      @RedSunFX Před 7 lety +3

      CaesarsSalad How would we know whether they even use decimal numbers. The digits of Pi change depending on your number system

    • @suwinkhamchaiwong8382
      @suwinkhamchaiwong8382 Před 6 lety +1

      tau is HORRIBLE

    • @PC_Simo
      @PC_Simo Před dnem

      @@RedSunFX We would probably send them out, in binary.

  • @Barnekkid
    @Barnekkid Před 7 lety +1

    I don't think I could live in a world without...pi.

  • @MrRodyfish
    @MrRodyfish Před 7 lety +2

    For some reason your smirky face at the end really brings tears to my eyes :D. It's like 'Damn I'm cool, and you know it!'. Nice t-shirts by the way :).

  • @ManhattanMadneSSSMusic
    @ManhattanMadneSSSMusic Před 8 lety +14

    At first I thought this was the next vihart anti pi rant...

    • @pi8557
      @pi8557 Před 8 lety +5

      But why

    • @PC_Simo
      @PC_Simo Před dnem

      I thought this was the next Matt Parker anti pi rant…

  • @WarpRulez
    @WarpRulez Před 8 lety +8

    Sending the digits of pi to aliens poses a small problem: We can't simply assume that they will be using base 10. And even if we would assume that, how exactly would we send those digits to them?
    I suppose that we can be almost completely certain that an alien civilization capable of receiving eletromagnetic radiation signals understands binary numbers, ie. base-2. So I suppose we would have to send then the decimal expansion of pi in base 2. That would also make it much easier because it would just consists of a series of pulses, so there's no need to worry about any more than two different digits.
    The question arises, though, how can we be sure that the alien civilization knows the concept of pi? Can we assume that the ratio between the mathematical circumference and its diameter is something that would be universally interesting and used?

    • @grahamrich9956
      @grahamrich9956 Před 8 lety +1

      I don't know the answer to this, but if it was developed at multiple places at once, then it probably would be universally accepted, at least by civilizations that can receive it.

    • @SpaghettiToaster
      @SpaghettiToaster Před 8 lety +3

      +WarpRulez Aliens live on planets. Planets are round.

    • @WarpRulez
      @WarpRulez Před 8 lety +1

      *****
      They are not mathematically spherical.

    • @SpaghettiToaster
      @SpaghettiToaster Před 8 lety +1

      ??????? Nothing is, what's your point?

    • @DrGerbils
      @DrGerbils Před 8 lety +4

      +WarpRulez Pi pops up in all sorts of places having no obvious connection to circles.

  • @GyanPratapSingh
    @GyanPratapSingh Před 8 lety +2

    this is just perfect!
    I was gifted one of those shirt from a friend of mine and I also bought another one from you as well

  • @PC_Simo
    @PC_Simo Před dnem +1

    3:33 They just fell asleep on their typewriter, at that point 😅.

  • @lawrencecalablaster568
    @lawrencecalablaster568 Před 8 lety +6

    Oh dear…if this is out, that means that soon Vi Hart will be making another passive-aggressive video about how much she dislikes Pi…I don't like those ones. But I do like her fractals!

  • @betheoliveira5626
    @betheoliveira5626 Před 5 lety +7

    Põe legenda em português. Seus vídeos são incríveis, você ensina matemática de forma tão íntima

  • @atrumluminarium
    @atrumluminarium Před 8 lety +2

    The long strings of 9 are actually very common early on. They are called Feynman points because the physicist Richard Feynman started the convention of terminating π after them and rounding up to store them in the first computation machines.

  • @PC_Simo
    @PC_Simo Před dnem +1

    Well, you *_DID_* kill the entirety of π, with just 1 kick, at the beginning 😅.

  • @112BALAGE112
    @112BALAGE112 Před 8 lety +9

    integral from -sqrt(2) to sqrt(2) of sqrt(2-x^2) dx is also pi

    • @Mathologer
      @Mathologer  Před 8 lety

      +112BALAGE112 Definitely t-shirt worthy :)

    • @BigGamer2525
      @BigGamer2525 Před 8 lety

      ...
      Whaaaa??????

    • @josevillegas2721
      @josevillegas2721 Před 8 lety +6

      +Mathologer
      integral of 1 from 0 to pi is also pi
      integral from 0 to 1 of pi is also pi

    • @Mathologer
      @Mathologer  Před 8 lety +4

      +Jose VIllegas Yeees, but probably not a t-shirt worthy fact :)

    • @AntoshaPushkin
      @AntoshaPushkin Před 8 lety +1

      +Mathologer seriously? It's an area of an arc, which is a half of a circle which has a radius sqrt(2). Sorry for my bad english.

  • @KnightsOfTheMemeTable
    @KnightsOfTheMemeTable Před 7 lety +5

    pi belt has 314 numbers/digits and goes around you 3.14 times?

    • @PC_Simo
      @PC_Simo Před dnem +1

      Yes. That’s my guess, too.

  • @PC_Simo
    @PC_Simo Před dnem +1

    I think there’s 314 decimals, and it fits around you π times 😅.

  • @DamnedEyez
    @DamnedEyez Před 8 lety +1

    I was a bit concerned that the title implied another video making the case for Tau...glad to see it was something else.
    Personally, I tend to remember only 5 decimals for both Pi and e. It's usually more than enough, and both round down at that point, so the numbers are the same if you stop or keep going.
    I do like that 3.14 PI.E shirt, though.

  • @MyAce8
    @MyAce8 Před 8 lety +5

    that black belt is a PIece of art, it's really beuTAUful

  • @Hwd405
    @Hwd405 Před 8 lety +10

    Pikwando ;)

  • @Soulwrite7
    @Soulwrite7 Před 8 lety +2

    Hey @Mathloger your videos are all quite well explained. Do you feel like trying to explain imagining higher dimension shapes (i.e. hypercubes ) xD

    • @Mathologer
      @Mathologer  Před 8 lety +1

      +Soulwrite7 I've got a nice 4d themed one in mind. Should appear before the middle of the year. But first I have to survive this one video I've been working on for a month :)

    • @Soulwrite7
      @Soulwrite7 Před 8 lety

      I am subscribed so I will be looking forward to it and all future content. =)

  • @llamarinio8090
    @llamarinio8090 Před 8 lety +1

    The funny thing is, if there wasn't a litteral pi button on the calculator us Engineers would just say "ehhhhhh, 3 is close enough". Still an impressive memory trick to remember all those didgits though, real "life of the party" stuff right there.

  • @KaiKunstmann
    @KaiKunstmann Před 8 lety +19

    It's not "Pi-Day", it's only "Half-Tau-Day" ... and it's only an approximation anyway.

  • @RexNunc
    @RexNunc Před 7 lety +6

    kicking Pi's butt one digit at a time, we'll get there, we'll get there....

  • @popuscornus42
    @popuscornus42 Před 8 lety +1

    Love it! Thank you for all the awesome videos.

  • @umbra4540
    @umbra4540 Před 7 lety +1

    You actually can kill all digits of pi if you use a supertask. Kill the first digit in one minute, then the second in half a minute, then the third in 15 minutes and so on.

  • @ChrisBandyJazz
    @ChrisBandyJazz Před 7 lety +19

    Isn't pi just the natural logarithm of -1 divided by the square root of -1?

    • @Mathologer
      @Mathologer  Před 7 lety +25

      JUST the natural logarithm of -1 ? :)

    • @Mathologer
      @Mathologer  Před 7 lety +24

      Sort of. The only way to make sense of ln(-1) is actually to consider ln(z) as a complex valued function and the only reasonable way of doing that actually turns ln(z) into a function that takes on infinitely many values for every z (just like root x takes on two different values). One of these infinitely many values (and in some way the "main" value) for ln(-1) is what you said. Anyway ln(z) is a bit of a monster. Definitely worthy of a video, so stay tuned :)

    • @ChrisBandyJazz
      @ChrisBandyJazz Před 7 lety +3

      Thank you! Yes, I was thinking about the complex plane as well.
      WolframAlpha tells me that it's correct; I was just solving for π in e^πi = -1. But I see what you mean-doing that is similar to squaring a number such as 2...you'll get to 4. If you try to go backwards, you won't always get back to 2, but that's the "main" answer. Is this the idea?
      Can't wait if you are planning on making a video on it!

    • @BenedictIrwin
      @BenedictIrwin Před 7 lety +2

      > I was just solving for π in e^(πi) = -1
      But also e^(3πi) = -1, e^(-πi) = -1, e^(nπi) = -1 for odd n. The 'main' answer part is that n=1.
      So in a sense ln(-1)/i = n*pi, where n is an odd integer.

    • @christiangeiselmann
      @christiangeiselmann Před 7 lety +3

      I think that pi is a proof that there is no god, or at least that he has not created the universe. If he had, he doubtlessly had made circles measurable by a simple beautiful 3.

  • @diegorojaslaluz962
    @diegorojaslaluz962 Před 8 lety +5

    I think that there are 262 digits of pi in that pi black belt, because the last digits are 69234.

  • @peterchan6082
    @peterchan6082 Před 2 lety +1

    0:18 - 0:56
    Absolutely LOVE that taekwondo clip.
    Expecting more, please !

  • @stevenvanhulle7242
    @stevenvanhulle7242 Před 5 lety

    The 999999 is called the Feynman Point. During a lecture Richard Feynman once said he would like to memorize pi to that point, so that he could say: "nine, nine, nine, nine, nine, nine, and so on".

  • @sinecurve9999
    @sinecurve9999 Před 8 lety +9

    Do you hold the rank of pi dan?

    • @Mathologer
      @Mathologer  Před 8 lety +3

      +sinecurve9999 That'd be great :)

    • @mr.questionmark5038
      @mr.questionmark5038 Před 6 lety

      pi "dan"??????????????????????????????????????????????/
      what does that mean

    • @podemosurss8316
      @podemosurss8316 Před 6 lety +1

      mr. questionmark Dan is a rank above black belt in some martial ars

  • @rodasnepervilo
    @rodasnepervilo Před 8 lety +25

    tau > pi

    • @yxlxfxf
      @yxlxfxf Před 8 lety +21

      no shit

    • @MaksProger
      @MaksProger Před 7 lety +42

      Actually, this is mathematically correct

  • @E1craZ4life
    @E1craZ4life Před 6 lety

    It only take 39 digits of pi to calculate the circumference of the observable universe within the margin of error of a single hydrogen atom.

  • @ch4r1z4u0153
    @ch4r1z4u0153 Před 8 lety +1

    Pi in base 10 is pretty arbitrary (I mean, what's so special about 10 besides the number of fingers on our hands?). Personally, I prefer pi in base pi, which I think is FAR more elegant :)

  • @yann1ck666
    @yann1ck666 Před 7 lety +4

    Hates pi. Wears a T-shirt with pi on it.

    • @Mathologer
      @Mathologer  Před 7 lety +5

      You managed to miss the whole point of the video, amazing :)

    • @yann1ck666
      @yann1ck666 Před 7 lety

      Mathologer Didn't watch it in its entirety because I got bored ¯\_(ツ)_/¯

    • @dombummel9345
      @dombummel9345 Před 7 lety

      :P

  • @EddieEntertainment
    @EddieEntertainment Před 8 lety

    IIRC pi day is at the 14th of march (american system 3/14)
    EDIT: where did you get the t-shirts? i liked the one at 6:22

  • @macullage
    @macullage Před 7 lety +1

    Now I get and appreciate your sense of humor ;-)

  • @anupamverma2133
    @anupamverma2133 Před 8 lety +1

    This gentleman here is totally backed up by facts.
    And I love this channel.

  • @henryg.8762
    @henryg.8762 Před 4 lety

    3blue1brown pi creatures: * chuckles * I'm in danger

  • @davidellis1929
    @davidellis1929 Před rokem +1

    Perhaps the belt was designed to fit around his waist exactly pi times...

  • @maxnullifidian
    @maxnullifidian Před 5 lety

    Thanks for the pi search page! I just found "the eights" (eight eights in a row) and discovered that they happen twice in the first 200 million digits! I first heard about "the eights" watching Northern Exposure.

  • @avinoamatzaba9853
    @avinoamatzaba9853 Před 6 lety +1

    Pi varies from 3.1416 to 3.164 , and its value depends on the real length of diameter ( 1 mm or 12 km )

    • @avinoamatzaba9853
      @avinoamatzaba9853 Před 6 lety

      img2.timg.co.il/forums/2/2357afa1-c99d-4e2c-9979-41506e265a07.pdf

  • @MrChewbee
    @MrChewbee Před 7 lety +1

    first time I laugh loud for a math thing, I'm 26 and I thank you haha

  • @Harlequin314159
    @Harlequin314159 Před 8 lety +2

    By the way you and the pi search page differ on how you count decimals. I tend to agree with the search page that the 3 is not counted. You mention zero occurs at the 33 decimal place, but it is the 32 according to this method of not counting the three. I don't mean to nit-pick. Great video!

    • @Mathologer
      @Mathologer  Před 8 lety +1

      +Harlequin314159 You are right, 0 is the 32nd digit after the decimal point. It's actually a bit annoying that there is no generally accepted convention what the "nth digit" of a number should mean. I personally think it should be literally the nth digit. I think that if you want to specify that you are talking about the nth digit after the decimal point (which makes a lot of sense) you really have to add the "after the decimal point". Just for fun ask WolframAlpha for the 33rd digit of pi.

    • @Harlequin314159
      @Harlequin314159 Před 8 lety

      +Mathologer I agree strongly. The difference between 33rd digit and 33rd decimal seems to be very semantic. Anyways, I in no way meant to disparage your video. Excellent content as always, cheers!

  • @essentialatom2
    @essentialatom2 Před 8 lety +1

    I thought the entire video was going to be smashing pi into pieces until you finally got to the last digit.

    • @ncedwards1234
      @ncedwards1234 Před 8 lety

      Not all of it, but I thought it would be a lot

  • @mathisalwaysright4048

    Pi is unbeatable :0 Unlike in periodic numbers we can't even loop the video to kill all of them :(

  • @marcelocampos665
    @marcelocampos665 Před 3 měsíci

    Sorry form my bad English. Here in Brazil, when a student is accepted at a university, it happens they are color-painted and have a whole hair cut as a "reception". They often go get some money for a party with the new and old mates. So, my car stopped at a lred light, an young guy asked me for money to this party. I asked him which course he was going to; so he answered engineering. I told I'd give him something if he told me 10 digits of PI correctly. He did! And, of course, received the reward.

  • @monster860
    @monster860 Před 7 lety

    At 6:48 there's a frame where you can clearly see the last digits on the belt, so I plugged it into the pi search engine. There are 263 digits of pi.

  • @Sjeorge
    @Sjeorge Před 7 lety +2

    Actually, you would only need 35 digits of pi to compute the circumference of the whole observable universe, up to the nanometer precise. we really don't need more digits of pi than that.

  • @robertromero8692
    @robertromero8692 Před 6 lety +2

    Love the "it was delicious" tshirt. :)

  • @wolfVFV
    @wolfVFV Před 8 lety

    the alien communikation idea is so cool O.o
    ps: pi is very nice for Random Generation maps:D

  • @TeunLos
    @TeunLos Před 8 lety +1

    last digits are 669234... so 262 digits from the first digital after the decimal point. 263 digits if you count the 3.

  • @andreimaria2137
    @andreimaria2137 Před 7 lety +1

    The belt has 262 decimals of pi(263 digits if you count the 3) and it fits 3-3,5 times around you

  • @PotatoMcWhiskey
    @PotatoMcWhiskey Před 8 lety

    Without knowing how tall you are, you seem to be in relatively good shape so I would estimate your waist to be between 75cm-100cm meaning the belt would wrap around you 4.14 to 3.14 times.
    Assuming each digit is 2.5 centimeters wide it would be around 115-126 digits depending on how close to the ends they go.

    • @PotatoMcWhiskey
      @PotatoMcWhiskey Před 8 lety

      If each digit is 1-1.5 cm(based on width of your fingers in video holding belt) it would be around 314-210 with minus 10-15 digits bringing it to about 299-195 range.

  • @renpnal229
    @renpnal229 Před 7 lety

    +Mathologer
    The belt ends with 234 and it first occurs at position 260 and since the next position of 2695 would be too large, it is easy to conclude that the belt has 262 digits of pi excluding 3. at the beginning.
    The belt most likely fits around you 3 times.

  • @Joslinmeister
    @Joslinmeister Před 7 lety

    The first t-shirt equation is not the same one listed next to you. The power of the integrand's denominator changes. So which one is correct? Thank you for the informative and entertaining videos, Mathologer!

  • @user-tt9uy5gg9o
    @user-tt9uy5gg9o Před 6 dny

    I tried calculating Pi using exhaustion from a hexagon in Excel. It choked after only 12 iterations.

  • @ballom29
    @ballom29 Před 8 lety +1

    "99999 is that a joke?"
    NEIN! NEIN! NEIN! NEIN! NEIN!

  • @jennifersiagian
    @jennifersiagian Před 7 lety

    Thank you for freely giving us your teaching..

  • @Math_oma
    @Math_oma Před 8 lety

    Also, that arctan series that appears in the top line of the book in "Life of Pi" is an obnoxious way to calculate the digits of pi (really pi/4). That damn series take forever to go anywhere, unless you know some series acceleration tricks.

  • @lunedefroid8817
    @lunedefroid8817 Před 7 lety

    Communicating with aliens by using pi is ridiculous. In fact you can send any short signal multiple times so they can understand that it is not a noise.

  • @mastercabs
    @mastercabs Před 8 lety

    This is an excerpt from my relatively new blog. This entry was from "Numbers Are Magic!"
    Rationalizing Pi
    When I learned about Plancks, and encountered the idea that space time was not like ether in the sense that it all just flowed, unbroken, like a river, but was actually more like a series of very small bits of sand rolling through a track, I started thinking more about micrology, if that is the correct word for it. We use π to help with our calculations of things that are not strictly linear or angular - and nothing really is, is it? Unless there is, essentially, a smallest unit of matter or space time, which would make sense in a world of Plancks. So, as we all know, π goes on forever from its pedestrian 3.14, right? Or does it? Keep in mind, if the world is quantifiable and numbers are a construct that we have created to make our home a little less Kafkaesque, then, eventually, when we hit a subatomic level of measurement, the very idea of π would be pointless. After all, with things like the Heisenberg Uncertainty Principle and Plancks, basing anything on a geometric area becomes sort of preposterous. Once circle is measured down to the area where it might or might not be inhabited by quarks, Higgs particles, and the like, it’s not really even measuring anything. So, if a Planck is the smallest unit of space-time, and we want to get some manner of numeric measurement from that, we’re looking at Yoctometers or 1 x 10-24. To get the farthest decimal of π, it would be necessary to look at the farthest possible extrapolation - the largest area by the smallest measurement. So, the approximate area of the universe measured in Yoctometers should give us something akin to decimal ending of π. While this is something we haven't necessarily been able to do, there are estimates (around 93 billion light years) and we have decimal places for π far, far, far beyond where we would need it to be for this manner of computation. Combining uncertainty and the smallest units of area only being in a theoretical place, π as a concept has a limit to its non-recurrence. In terms of an ideal, it does not. However, in practical, real world application, it would. I submit that to take π out any further than yoctometer measurements would be superfluous because it couldn’t really be measuring anything. That would mean that, theoretically, we already have solved for π as far as we will ever need and as far as is practical as a number.
    True, it could go on farther, but if numbers exist to measure things, and there is nothing that that iteration of π could measure. Then I must ask, is it really a number at all? From the Wittgensteinian definition of use and meaning, no, it really isn’t.
    Check out the whole thing at demonvsrabbit.thecomicseries.com/blog/

  • @carlgansen1600
    @carlgansen1600 Před 8 lety

    Communicating with aliens using Pi... If those aliens have 14 toes and 14 fingers they may have a base 14 number system and their view of Pi would differ. Our dominant 10 character number may be unique to us.

  • @MrJasbur1
    @MrJasbur1 Před 8 lety +2

    PI is good for benchmarking computer hardware

  • @ericsparkman1303
    @ericsparkman1303 Před 7 lety

    Awesome, I love this stuff

  • @DrAvery-lc6bs
    @DrAvery-lc6bs Před 4 lety +1

    We're still waiting for the Tau video.
    ;^)

  • @erbse1178
    @erbse1178 Před 8 lety

    Its is known fact that Chuck Norris counted to infinity twice. Now that means he is a greater mathematician than everyone thought, because on his way to infinity he must have counted all the digits of Pi (except 3 of course) ... TWICE !
    Have a nice PI on this PI fact !

  • @BolgAryaNbyRama
    @BolgAryaNbyRama Před 5 lety

    6 : 18
    integral ( 0 1 ) ( x ^ 4 ( 1 - x ) ^ 4 / ( 1 + x ^ 4 )) is fantasy...
    integral ( 0 1 ) ( x ^ 4 ( 1 - x ) ^ 4 / ( 1 + x ^ 2 )) is the correct! (the T-shirt)
    You tried to trick us with the expression on the flying board - you powered x at 4th instead of second in the integrals' denominator...
    Good one, lolz!
    I like mirrors too, btw!
    Really fun to watch once again! :D

  • @factsheet4930
    @factsheet4930 Před 8 lety +2

    It ends with the string 669234, so i went to the site to look how many digits the belt has:
    The string 669234 occurs at position 257.
    counting from the first digit after the decimal point. The 3. is not counted.

    • @factsheet4930
      @factsheet4930 Před 8 lety +1

      +marco polo So 263 digits, which is very odd...

    • @factsheet4930
      @factsheet4930 Před 8 lety +1

      +marco polo +the 3 is 264

    • @DrCrazySymbols
      @DrCrazySymbols Před 8 lety

      +marco polo this means that the 6 is at position 257, so the 4 is at position 262, meaning there are 263 digits in total (including 3). I did the same thing. I had to go frame by frame to see it properly.

    • @factsheet4930
      @factsheet4930 Před 8 lety

      ***** But... I also then noticed that there are numbers on both sides of the belt... so... we could be wrong possibly

    • @DrCrazySymbols
      @DrCrazySymbols Před 8 lety

      The ones on the back are mirrored. Those are the ones we saw. Plus: Mathologer confirmed it was 263 on my comment.

  • @rithvikmuthyalapati9754
    @rithvikmuthyalapati9754 Před 2 lety +1

    3Blue1Brown: *panicc

  • @numbr6
    @numbr6 Před 3 měsíci

    I have a t-shirt with a spiral of Pi digits similar to that displayed at 2:00 in this video. Problem solving interview question I ask: How many digits of Pi are on my shirt? You can use any resource, tool, web site, anything to answer this question. You have 5 minutes. I print a magnified image of the center of the spiral so they can see final 20 or so digits printed on the shirt (hint hint!); there is no final digit of Pi.
    This is interviewing software engineers, and all I want to see is how the approach answering this question. I was curious, because it was my t-shirt. Counting the digits is obviously impossible in 5 minutes. The answer to this is obvious, and you would be surprised how many people can't find a workable approach. The funny thing about this shirt is the number of printed digits is a "magic number" to software people: 2^10 😃

  • @kinggeorgedental5766
    @kinggeorgedental5766 Před 8 lety

    I was confused about your shirt that showed 3

    • @Mathologer
      @Mathologer  Před 8 lety +1

      +King George Dental Don't think of the diagram in terms of areas, think of it in terms of the lengths of the curves that you see :)

    • @kinggeorgedental5766
      @kinggeorgedental5766 Před 8 lety

      +Mathologer Thanks!! yes, that's clear. Had a mental block. I guess that's why I'm a dentist.

    • @Mathologer
      @Mathologer  Před 8 lety +1

      My wife is a dentist ! Oh and by the way I also have a nice t-shirt where 3

    • @kinggeorgedental5766
      @kinggeorgedental5766 Před 8 lety

      +Mathologer Wow, cool that you have a dentist wife! I'm sure you've learned a lot about this crazy profession through your wife. I wish I could have been a mathematician. However, i'm glad I can still enjoy it as a hobby. You sure have a lot of pi shirts!

  • @PiTheDecimal
    @PiTheDecimal Před 2 lety

    Like come on, man. How dare you oppose me? I am immortal. I am infinite. Taekwondo won’t kill me. Nothing will.

  • @danhuigong12
    @danhuigong12 Před 3 lety +1

    one symbol kills it all

  • @johnlabonte-ch5ul
    @johnlabonte-ch5ul Před 7 měsíci

    Almost totally agree. But what amount of digits do we need. With the improvements of telescopes and microscopes it has surely changed the need for the number of digits.

  • @rrni2343
    @rrni2343 Před 8 lety

    I would like a t-shirt with this:
    "Pi is immortal."

    • @Mathologer
      @Mathologer  Před 8 lety +1

      +Árni Þór Þorgeirsson No problem. These days it is very easy to have your own designs printed on t-shirts. In fact, half of the t-shirts you see in this video I designed and printed myself :)

  • @TheLittleViridianFighter

    The black belt has 314 digits of pi and it fits around you 2.718281828459045 times.

  • @2k5dcr
    @2k5dcr Před 3 lety +2

    3B1B: OH NO

  • @NoriMori1992
    @NoriMori1992 Před 8 lety

    I require those pi(e) t-shirts immediately.

  • @itsdjpenguin
    @itsdjpenguin Před rokem +1

    Grant from 3b1b and Matt Parker will be very upset about this!

  • @christopherellis2663
    @christopherellis2663 Před 7 lety

    22/7 is perfectly good for most things, with the possible exception of calculating orbits.
    Tau: tough! 44/7 suits it to a T.

  • @chumsky8754
    @chumsky8754 Před 7 lety

    Any rational multiple of Pi could be useful to something. For history's sake, I stick with Pi!