Same perimeter, different areas: Which is the largest? The Isoperimetric Problem

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  • Опубліковано 11 січ 2025

КОМЕНТАРІ • 55

  • @benhur2806
    @benhur2806 9 місяців тому +31

    0:17 - Simple! Wrap the fence around yourself as tightly as possible, and shout "I define my current location to be outside of the enclosed area!"

  • @jaafars.mahdawi6911
    @jaafars.mahdawi6911 9 місяців тому +13

    This is so RICH of a video! Chapeau bas!

  • @Pictoo-ID
    @Pictoo-ID 9 місяців тому +3

    Your words were clear and your proofs were amazing. I really enjoy to watch this!

  • @ydjemmada
    @ydjemmada 9 місяців тому +16

    Excellent work! It's fantastic to see Algerian content utilizing manim on UA-cam.
    Just a suggestion: you may want to consider improving the sound recording quality.

  • @saltyowl3229
    @saltyowl3229 5 днів тому +1

    If you have at least an understanding of the language used in math and the concepts they represent, dude really gave an entire introductory course to shape theory. Hell yeah.

  • @ShivacuuM
    @ShivacuuM 8 місяців тому +3

    Finally a video with the perfect speed and rigor level
    So hyped to watch more of it

  • @leobro2666
    @leobro2666 9 місяців тому +5

    Simply astonishing !

  • @tomkerruish2982
    @tomkerruish2982 4 місяці тому +1

    4:09 There's also the case r = omega (sorry, no Greek letters on my phone), signifying that the curve is real-analytic, i.e. its power series converges to itself. There exist infinitely-differentiable functions that are nowhere analytic.

  • @taylorsmiles4143
    @taylorsmiles4143 9 місяців тому +3

    Great video. Looking forward to more.

  • @aminezemirni
    @aminezemirni 9 місяців тому +9

    Good job, team ❤❤❤❤

  • @newwaveinfantry8362
    @newwaveinfantry8362 9 місяців тому +3

    8:30 - I don't think you need this. Gamma is continuous and [a,b] is compact. Thus gamma([a,b]) is compact in R^2. Thus it is bounded, so it is rectifiable.

    • @tomkerruish2982
      @tomkerruish2982 4 місяці тому

      Hilbert curve?
      Never mind, it's not simple.

    • @newwaveinfantry8362
      @newwaveinfantry8362 4 місяці тому

      @@tomkerruish2982 Hilbert curves have nothing to do with this. I said compact, not dense. Compact, as a subset of R^2, just means closed and bounded. More generally, it means a topological space whose topology can be generated from a finite set and thus every open cover has a finite subcover.

    • @tomkerruish2982
      @tomkerruish2982 4 місяці тому

      @newwaveinfantry8362 The Hilbert curve is continuous, and thus maps compact sets to compact sets. However, it is clearly not rectifiable.

  • @rezkichemlal4998
    @rezkichemlal4998 9 місяців тому +7

    Keep up the good work

  • @newwaveinfantry8362
    @newwaveinfantry8362 9 місяців тому +5

    Underrated video.

  • @AndrewBalm
    @AndrewBalm 9 місяців тому +3

    Very nice content!

  • @Patrickoliveirajf
    @Patrickoliveirajf 6 місяців тому +1

    Great video!

  • @konstantin7596
    @konstantin7596 8 місяців тому +3

    So nice!

  • @rujon288
    @rujon288 9 місяців тому +5

    very good video

  • @lexkoal8657
    @lexkoal8657 8 місяців тому +3

    Nice video. Visuals are good, but there are some issues with audio. Sometimes it's good, sometimes it's bad, overall, inconsistent

  • @maths.visualization
    @maths.visualization 4 місяці тому +1

    Can you share video code??

  • @DanDart
    @DanDart 8 місяців тому +1

    Ah yes, Mr. Fence and Mr. Field, thanks Kjartan Poskitt!

  • @spazmoidectomorf6209
    @spazmoidectomorf6209 7 місяців тому +1

    Do you learn this im differential geometry? I really like this stuf and the calculus of variations but i dont know where to start
    What books would you recommend?

    • @MathVerseAnimated
      @MathVerseAnimated  7 місяців тому +1

      Hello, we are happy that our video has spiked you curiosity!
      I assume you're familiar with general topology and you have taken a real analysis course and an affine geometry course. A good book to start with is "Functions of several variables" by Martin Moskowitz and Fotios Paliogiannis which will provide you with the necessary foundations and preleminaries to move onto the book: "Curves and Surfaces" by Sebastian Montiel and Antonio Ros, it not only contains the content of this video (and much more) but also serves as a great introduction to differential geometry.

    • @spazmoidectomorf6209
      @spazmoidectomorf6209 7 місяців тому

      @MathVerseAnimated ah okay nice. Thank you!

  • @SarahAliradi
    @SarahAliradi 9 місяців тому +8

    Break a leg guys 🩵😍

    • @MathVerseAnimated
      @MathVerseAnimated  9 місяців тому +2

      Thank you !

    • @leif1075
      @leif1075 7 днів тому

      ​@@MathVerseAnimatedwhy is she telling you that?

  • @chaymaahamou7433
    @chaymaahamou7433 26 днів тому +1

    When next video ??

    • @MathVerseAnimated
      @MathVerseAnimated  26 днів тому +1

      We plan to post a new video this week about Catalan numbers! Be tuned!

    • @chaymaahamou7433
      @chaymaahamou7433 26 днів тому +1

      @@MathVerseAnimated we will see :)

  • @John-pp2jr
    @John-pp2jr 9 місяців тому +2

    Circle.

  • @AbhinavK-no4ij
    @AbhinavK-no4ij 7 днів тому +1

    A suggestion... Include background music and intro

  • @gleleylo
    @gleleylo 8 місяців тому

    Why you skipped area integral proof?

    • @MathVerseAnimated
      @MathVerseAnimated  8 місяців тому

      I'm not sure which one you're referring to, but if it's the first one, it doesn't need a proof because it's a definition :) if you mean seeing intuitively that it gives the area, we thought it was simple to see how to apply the same process as the one for the arc length (it later turned out this wasn't the case, and an explanation was warranted).

    • @gleleylo
      @gleleylo 8 місяців тому

      @@MathVerseAnimated yeah, it's not obvious at all how this integral relates to the area

  • @pandavroomvroom
    @pandavroomvroom 9 місяців тому +2

    why is the "proof" of arclength not a proof

    • @MathVerseAnimated
      @MathVerseAnimated  9 місяців тому +3

      Well, "The sum becomes an integral and Δsomething becomes d something" is not really a mathematical sentence. If you want to make it into a proof, you have to use something like Riemann sums or similar to show that the sum converges to the integral.

  • @ucngominh3354
    @ucngominh3354 9 місяців тому +2

    hi

  • @mihaleben6051
    @mihaleben6051 6 місяців тому

    Yeah, areas are weird.

  • @notu483
    @notu483 9 місяців тому +4

    Try not to spit in the mic

    • @MathVerseAnimated
      @MathVerseAnimated  9 місяців тому +2

      Thank you, we will be more mindful new time!

    • @benhur2806
      @benhur2806 9 місяців тому +3

      ​@@MathVerseAnimatedYou might want to install a pop filter...

    • @lunam7249
      @lunam7249 9 місяців тому +1

      mics should be at least 2 feet from your mouth better 3 feet!!

    • @عمرأبوستة-ح1ك
      @عمرأبوستة-ح1ك 9 місяців тому +7

      Try to be more polite next time... you are watching for free, remember.

    • @lunam7249
      @lunam7249 9 місяців тому +1

      @@عمرأبوستة-ح1ك he was spitting in the mic...its not an AMSR pervo channel...

  • @jickey6108
    @jickey6108 7 місяців тому

    The mic kills the video