QualityMathVisuals
QualityMathVisuals
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How many lines go through 4 given lines in 3D?
Hello everybody! Sorry for the lack of upload. As it turns out, applying for PhD programs in Mathematics is more time consuming than it sounds! I hope you enjoy this video about intersecting lines in three dimensions. It may not be incredibly helpful when studying for a calculus exam, but it's a fun problem inspired by a recent course I took titled "Equivariant Cohomology." The tools I learned in the class explain the question in the title with just a few lines of math! I hope you enjoy :)
Here are some links for further reference:
Awesome repository of animations by Frank Sottile:
people.tamu.edu/~sottile/research/stories/index.html
For people comfortable with some college-level math:
mathworld.wolfram.com/RuledSurface.html
math.uchicago.edu/~may/REU2021/REUPapers/Naughton.pdf
Credits for the incredibly quiet music in the background:
Music from #Uppbeat (free for Creators!):
uppbeat.io/t/danger-lion-x/the-street-market
License code: WUC7ALPQF3BH99AI
uppbeat.io/t/night-drift/scuffle
License code: G5AQQ8LYO3NGKCUS
uppbeat.io/t/ra/cold-brew
License code: UOSLE5FF14MCUEPA
uppbeat.io/t/avbe/night-in-kyoto
License code: 9D5TVX0JJ3J1KNPG
uppbeat.io/t/prigida/mellow-bop
License code: 6CD4OIOIWY50WLLD
Переглядів: 2 064

Відео

Can you diagonalize every matrix?
Переглядів 1,9 тис.Рік тому
Discover the how complex eigenvectors can be visualized, understand diagonalizability, and dive deeper into the world of invariant factors. Enjoy the vid! Here is the previous video on visualizing diagonalization: ua-cam.com/video/yJ3EfoJmTFg/v-deo.html Made by Nic Swanson Follow me on Twitter for more Math related content! @QualityMathVis Code for the Videos: (repository work in progress) gith...
Visualizing Diagonalization
Переглядів 27 тис.Рік тому
Diagonalization allows us to compute very large powers quickly, which has uses in computer science, engineering, and modeling as square matrices can represent all kinds of things. There is a new video soon answering the question: "Can a matrix always be diagonalized?" Made by Nic Swanson Follow me on Twitter for more Math related content! @QualityMathVis Code for the Videos: (repository work in...
Why can’t a continuous function from 1D to 2D be invertible?
Переглядів 1,3 тис.Рік тому
Why can't you fill in a box without crossing over yourself? The math equivalent of the question is: Why can't a continuous function from a line to a square be one to one and onto? It turns out, you can't! Made by Nic Swanson Follow me on Twitter for more Math related content! @QualityMathVis Code for the Videos: (repository work in progress) github.com/QualityMathVisuals/VideoCode Music Stuff: ...
Can a continuous function from 2D to 3D be onto?
Переглядів 3,5 тис.Рік тому
Are you ready to dive into the world of topology and analysis? Today, we explore an intriguing question: Can a continuous function from 2D to 3D be onto? We take a deep dive into the concept of space-filling curves and the relationship between continuity and dimensionality. You'll learn about the limits and possibilities of continuous functions and discover the beauty and complexity of the math...
SOLUTION Can a linear transformation from 2D to 3D be onto?
Переглядів 4,5 тис.2 роки тому
Can a linear transformation from R2 to R3 be onto? Linear algebra is beautiful and you have the right to see it! Learn about topics in linear algebra like image, linear transformations, surjectivity, and more! Made by Nic Swanson Follow me on Twitter for more Math related content! @QualityMathVis Music Stuff: uppbeat.io/t/avbe/night-in-kyoto License code: Q2KQJMN2W63HGEP7
Can a linear transformation from 2D to 3D be onto?
Переглядів 4,8 тис.2 роки тому
Can a linear transformation from 2D to 3D be onto?

КОМЕНТАРІ

  • @lephtovermeet
    @lephtovermeet 4 дні тому

    This makes so much more sense. Basically redefine ijk-hat to be in the direction of your transformed matrix.

  • @lephtovermeet
    @lephtovermeet 4 дні тому

    Amazing video, thank you! Does Span mean the same as Range?

  • @lephtovermeet
    @lephtovermeet 4 дні тому

    Good video but the gen Z formatting 🤮🤮🤮🤮

  • @lephtovermeet
    @lephtovermeet 4 дні тому

    Can we F'ing not generic AI voice with constantly shifting visuals?

  • @saltdestroyer
    @saltdestroyer 19 днів тому

    mini 3blue1brown

  • @buzzbuzz20xx
    @buzzbuzz20xx 2 місяці тому

    beautiful

  • @edwardgongsky8540
    @edwardgongsky8540 2 місяці тому

    This made diagonalization more confusing. thanks chump!

  • @sanchitaagte8215
    @sanchitaagte8215 2 місяці тому

    absolutely stunning. deserves to have more views and you more subscribers <3333

  • @Fish-vs6jf
    @Fish-vs6jf 2 місяці тому

    Didn't understand a single word of this, but it was pretty!

  • @cementedlightbulb
    @cementedlightbulb 3 місяці тому

    I am surprised that this has only 15k views

  • @muazalli8999
    @muazalli8999 5 місяців тому

    Is it that: if the curve intersects a previous point it had already been at, then it is not one to one?

  • @diamondredchannel8024
    @diamondredchannel8024 6 місяців тому

    Sir can you send me example of diagonalisable 5×5 matrix example

  • @Sarah-pu8un
    @Sarah-pu8un 7 місяців тому

    Wow! Extremely helpful

  • @B-Ted
    @B-Ted 7 місяців тому

    Truely Underrated 🌟

  • @zedentee5652
    @zedentee5652 8 місяців тому

    Wth you are so underrated

  • @Nalber3
    @Nalber3 8 місяців тому

    I was thinking the other day what was used before analytical geometry. And then discovered synthetic geometry. I think there's a need for a balance between analytical and synthetic geometry. What do you think? Lovely animation, btw ❤

    • @Nalber3
      @Nalber3 8 місяців тому

      I see a lot of potential in blender as a game changer to do simulations using interconnected nodes 😊

  • @buirabxs
    @buirabxs 8 місяців тому

    Guys how i understand we dividing some linear transformation to different steps that easier to calculate, i mean our p matrix help us to change basis and D changes sizes and P inverse ends the work,now i have question: Is it correct to say that P realize some rotation that we need and D just change sizes????

  • @starcrosswongyl
    @starcrosswongyl 8 місяців тому

    Hi with regards to the PDP^-1. The P^-1 is convert to the new basis after which scale by D and then rotate back to the standard basis by P. Am i correct?

  • @CrusaderGeneral
    @CrusaderGeneral 8 місяців тому

    I can watch these in a loop all dal long!

  • @SailorUsher
    @SailorUsher 8 місяців тому

    Thank you so much!!!

  • @anonymoususer4356
    @anonymoususer4356 9 місяців тому

    Superb video!

  • @jonkazmaier5099
    @jonkazmaier5099 9 місяців тому

    HOW does this not have more views?? Best visualization of this concept I have ever seen

  • @spyral2108
    @spyral2108 9 місяців тому

    Wow, this is incredible. I must say you have done a very good job with this video, and you explained the concepts of diagonalization very concisely. Thanks!

  • @Abcdeee_p
    @Abcdeee_p 9 місяців тому

    wow!

  • @theodoreshachtman7360
    @theodoreshachtman7360 9 місяців тому

    Amazing video 🎉

  • @nzhnaz
    @nzhnaz 9 місяців тому

    u are more helpful than my teacher what

  • @928balazs
    @928balazs 10 місяців тому

    Man i bearly even comment on any youtube videos, but i feel i really need to express how i feel about your videos. At first 3Blue1Brown brought me close to mathematics, since then, im obsessed with it. There are many really good YT channels, that introduce interesting topics in this field, but man you're so good. Please keep up the work man, i know you're not as big right now, as you would appreciate it, but if you keep on going, with this style, i bet you will be as big as 3B1B or bigger. Thank you for your educational content!

    • @qualitymathvisuals
      @qualitymathvisuals 10 місяців тому

      Thank you so much for your encouragement! It means a lot and I truly wish I had more time to grow the channel.

  • @Physics22KU
    @Physics22KU 10 місяців тому

    Remember us when you're big😢😢

  • @Dent42
    @Dent42 10 місяців тому

    Good lord I hate that voice.

  • @tune_m
    @tune_m 10 місяців тому

    Very insightful! Question: when you read the equation at 4:27 you read it from left to right, but aren't the matrices composited from right to left?

    • @tune_m
      @tune_m 10 місяців тому

      As a consequence I read it as "align the eigenvectors with the standard basis" -> "scale standard basis" -> "move the eigenvectors back"

    • @tune_m
      @tune_m 10 місяців тому

      But I'm unsure whether my interpretation is correct

    • @qualitymathvisuals
      @qualitymathvisuals 10 місяців тому

      Excellent question! Yes, given two matrices A and B, their product can be interpreted as the composition of the linear transformation of A with the linear transformation of B. So AB is the transformation that applies B and then A. So yes, the order of highlighting used in the animation is not helpful for this understanding, good catch!

    • @tune_m
      @tune_m 10 місяців тому

      @@qualitymathvisuals Thanks for the prompt response! I'm currently a TA for an undergrad LinAlg course so this video serves me (and my students) well.

  • @debblez
    @debblez 10 місяців тому

    how are you sampling your random lines? You say its unlikely that there are zero solutions, but it’s not a 0% chance like there being one solution is.

    • @qualitymathvisuals
      @qualitymathvisuals 10 місяців тому

      Excellent question! Uniformly picking a random line in 3D I don’t think is as simple as picking two points and drawing the line between them. The argument that gives you 0 probability of a line not intersecting a hyperboloid involves showing that a line that does not intersect the hyperboloid has gradient orthogonal to to the vector that gives the “direction” of the hyperboloid. Thus, the set of all line gradients that give lines not intersection the hyperboloid is “measure 0” in 3D. This does not mean that there are no lines, but this means that when sampling random lines, there is 0 probability that they do not intersect the hyperboloid.

    • @debblez
      @debblez 10 місяців тому

      @@qualitymathvisuals its definitely not measure 0. if it were measure 0 then most pictures of a hyperboloid would just be a solid color with a few points or curves missing. However most pictures of hyperboloids have a nonzero negative space so this is obviously not the case

    • @qualitymathvisuals
      @qualitymathvisuals 10 місяців тому

      Sorry, I’m not sure I understand you. What does color have to do with Hyperboloid’s? We are taking about lines in 3D intersecting the hyperboloid

    • @debblez
      @debblez 10 місяців тому

      in fact in the case of a hyperbolic paraboloid, its pretty clear that the further the fourth line is from the other three the less likely it intersects the surface, in the limit tending to zero. So at least for that case some sampling methods would give a 100% chance of no solutions.

    • @debblez
      @debblez 10 місяців тому

      @@qualitymathvisuals when you make a picture of a hyperboloid, each pixel can be thought of as a yes/no of does the line from the camera through a point on a screen a fixed distance away intersect the hyperboloid.

  • @productivebien-aime
    @productivebien-aime 10 місяців тому

    good stuff

  • @AbuMajeed3957
    @AbuMajeed3957 10 місяців тому

    Thank you

  • @DimitrijeĆirić-x1x
    @DimitrijeĆirić-x1x 11 місяців тому

    Thanks! Great video

  • @guillermogarcia8912
    @guillermogarcia8912 11 місяців тому

    Great video , greetings from Spain !

  • @alexmathewelt7923
    @alexmathewelt7923 11 місяців тому

    Fun fact: to calculate the largest power of a matrix, where the exponent still fits in 64bit unsigned long, there are only 128 Multiplications needed. Example: You want to calculate 5^14. We split the exponent in binary: 5^(2¹+2²+2³) = 5² × (5²)² × ((5²)²)² = 6.103.515.625 . We only have to x := x², and if the current bit is on, we multiply our result with the current power, then we square x again... So to calculate powers up to about 4 Billion, u only need at most 64 multiplications. 32 for the squaring and at most 32 for the result multiplication. Since computers do not have more difficulties with larger numbers , that reduces the amount of calculations by an insane amount.

    • @qualitymathvisuals
      @qualitymathvisuals 11 місяців тому

      What a spectacular insight! The algorithm you are describing is called the “square and multiply algorithm” and is one of the main tools needed for computational cryptography. Hopefully I can talk about it soon in an upcoming video!

  • @wyboo2019
    @wyboo2019 11 місяців тому

    there's a great book called Linear and Geometric Algebra by Alan Macdonald. while a good portion of it is about building the foundation of geometric algebra (a very clean way of unifying many parts of linear algebra by defining a new operation on vectors), the best part about the book is that it teaches linear algebra and linear transformations without much matrix usage; there's like one or two chapters covering matrices, as they are important, but most discussion of linear transformations is matrix-free. i really like it because i think matrices are so heavily tied with linear transformations that the two tools can get conflated with one another

    • @qualitymathvisuals
      @qualitymathvisuals 11 місяців тому

      What a great observation! Macdonald is one of the great when it comes to abstract algebra. I believe linear transformations are an incredible artifact of the human brain, coming from the more general idea of morphisms, matrices are just a way of describing their details in a well understood situation. Thank you for the thoughtful comment!

  • @bald6354
    @bald6354 11 місяців тому

    Great video and visuals. Thanks!

  • @martinmartinmartin2996
    @martinmartinmartin2996 11 місяців тому

    It s dfficult for me to understand HOW to prove the intercesections of lines in the simplest of cases. Could you give a reference where such a proof can be found?

    • @qualitymathvisuals
      @qualitymathvisuals 11 місяців тому

      That is perfectly understandable! Most of the statements said in the video are non-trivial and I give very little intuitition for the proof. A proof for the main theorem in the video can be found in H. S. M. Coxeter (1969) Introduction to Geometry, page 259.

  • @quantumgaming9180
    @quantumgaming9180 11 місяців тому

    Nice

  • @5ty717
    @5ty717 11 місяців тому

    Great intuition bro… great teaching too

  • @5ty717
    @5ty717 11 місяців тому

    This shows your very deeply intuition

  • @5ty717
    @5ty717 11 місяців тому

    Very good… can u do some physical basics as well… like Bell local realism Inequalities and double slit exp… i know it’s physics but the way you intuit may help

    • @qualitymathvisuals
      @qualitymathvisuals 11 місяців тому

      Maybe! I am a math student, but they are highly related.

  • @OpPhilo03
    @OpPhilo03 11 місяців тому

    Great video sir. Thank you so much Sir❤

  • @theatomicboy8135
    @theatomicboy8135 11 місяців тому

    until the end when i checked the sub and view count, i thought that this was some big math youtuber that i haven't heard of yet. great work man really well made

  • @marvinkoedding
    @marvinkoedding 11 місяців тому

    Is this video inspired by the advent of code exercise? 😅

  • @quantumgaming9180
    @quantumgaming9180 Рік тому

    The video is amazing. Only thing I would complain about is that you didn't write the conclusion theorem in words at the end since I got lost in the pictures

    • @qualitymathvisuals
      @qualitymathvisuals 11 місяців тому

      Thank you for the feedback! You are right, the ending is pretty rushed.

  • @TheJara123
    @TheJara123 Рік тому

    Why so low views? Low subs? Beyond me!!.. May be changing channel name might help?

    • @qualitymathvisuals
      @qualitymathvisuals Рік тому

      Haha maybe so! I like titles that are right to the points, so probably not :) New video tomorrow!

    • @TheJara123
      @TheJara123 Рік тому

      Alright, keep straight!! New video tomarrow!! I am dancing in circle of eight like a honey bee!!

  • @TheJara123
    @TheJara123 Рік тому

    Any new video soon?

    • @qualitymathvisuals
      @qualitymathvisuals Рік тому

      Yes! A longer length video coming soon that deals with lines and Hyperboloids!

    • @TheJara123
      @TheJara123 Рік тому

      @@qualitymathvisuals really!! Longer video !! woow that's coolest news !! Worth the waiting!!

  • @Physics22KU
    @Physics22KU Рік тому

    It's beautiful but I think the title should be changed or maybe the content. The title is a bit misleading as it doesn't actually show a function that takes a sphere as an input