Diagonalize 2x2 matrix

In this video I show how to calculate the eigenvalues and eigenvectors of a 2x2 matrix A, and show how to find a diagonal matrix D and an invertible matrix P such that A = PDP^-1

Пікірлер: 87

  • @albertemc2stein290
    @albertemc2stein2906 жыл бұрын

    I'm a simple mathematician. I see a Peyam video. I like the video.

  • @ServerDweller
    @ServerDweller3 жыл бұрын

    I've got my end of years exams coming up and I can't believe I've just found a single channel that covers such a large portion of the content. I wish I had found it sooner. Thanks for the video!

  • @jacobpickos733
    @jacobpickos733 Жыл бұрын

    The MAN, the MYTH, and the LEGEND. Thank you, Sir!!!

  • @jososa5717
    @jososa57173 ай бұрын

    Clearest, best video on the topic. You have a gift for teaching, thank you so so much Dr. Peyam!

  • @brianlamptey4823
    @brianlamptey48235 жыл бұрын

    I've tried looking for this stuff online, this is the first time I've found someone who has cared to go into the 'how'.

  • @Selenatorgirl544
    @Selenatorgirl5442 жыл бұрын

    Thank you for being so positive in every video! (please don't feel pressure bc I say that.) It's so obvious that you love math and bc of this energy of you I feel like I can solve any problem :) Thank you again!!

  • @drpeyam

    @drpeyam

    2 жыл бұрын

    Thank you!!! 😁

  • @dolevgo8535
    @dolevgo85356 жыл бұрын

    MAN i literally had my linear algebra test two days ago :( damn it! anyways thank you so much!

  • @MrCigarro50
    @MrCigarro506 жыл бұрын

    So great, as always, clear and helpful. Thank you.

  • @eduardorivera508
    @eduardorivera5086 жыл бұрын

    Ooohhh! I'm excited for the Legend Of Zelda analogy!!

  • @adrianleranoz13
    @adrianleranoz136 жыл бұрын

    Me encantan tus vídeos! Sigue así!

  • @unless14th
    @unless14th3 жыл бұрын

    Thank you for this solution. It makes me clearly and able to prepare teaching materials easily. Your explanation is easy to understand for many people who are interested in Math.

  • @adelbennaceur7636
    @adelbennaceur76364 жыл бұрын

    thank you sir i really like your energy

  • @axollotl5813
    @axollotl58135 жыл бұрын

    short simple and clear. Well Done 👍

  • @BaljinderSingh-tf2sn
    @BaljinderSingh-tf2sn4 жыл бұрын

    amazing what a simple explanation to problem which looked very complicated!!!!!!!!!!! thanks alot !!!!! please keep uploading the videos you are doing amazing job!!!!!!!!!!!!!!! Great work

  • @determinantmatrix9584
    @determinantmatrix95842 жыл бұрын

    Really loved this video Thanks Dr. Peyam

  • @bradvincent2586
    @bradvincent25864 жыл бұрын

    wow this was insanely helpful!

  • @noahalexander3607
    @noahalexander36075 жыл бұрын

    i love this man

  • @raphaelcosta4352
    @raphaelcosta43525 жыл бұрын

    Tks, i love it. Linear algebra is very beatiful

  • @mathkaveli11
    @mathkaveli11 Жыл бұрын

    Love your work

  • @jeongohseo3631
    @jeongohseo36314 жыл бұрын

    Thx for good lecture :) very helpful to me!!

  • @Titurel
    @Titurel3 жыл бұрын

    Dr. P is one of my math heroes!

  • @eliascaeiro5439
    @eliascaeiro54396 жыл бұрын

    42 ! Great video as always.

  • @akay37
    @akay375 жыл бұрын

    Thank you so much!

  • @azazahmed1842
    @azazahmed18422 жыл бұрын

    aahhhhh sooo helpful thaaanks

  • @jesuisjustinian
    @jesuisjustinian6 жыл бұрын

    Just in time for my LA final today :D

  • @Gabbyreel
    @Gabbyreel6 жыл бұрын

    Thanks!

  • @nadeenyahya1384
    @nadeenyahya13845 жыл бұрын

    Thankyou well explained

  • @yasseralg3928
    @yasseralg39284 жыл бұрын

    I love you! I said it to you first before my soon-to-be wife!!

  • @drpeyam

    @drpeyam

    4 жыл бұрын

    Awwwww, what an honor! 🥰

  • @gvantsasakaruli9900
    @gvantsasakaruli9900 Жыл бұрын

    You did something in such a short time that my professor has been struggling to explain for last two lectures with each being 1,5 hour long..

  • @dominikstepien2000
    @dominikstepien20006 жыл бұрын

    That's great I've just started learning linear algebra, make more videos about LA, please!

  • @drpeyam

    @drpeyam

    6 жыл бұрын

    I have a whole linear algebra playlist if you’re interested!

  • @dominikstepien2000

    @dominikstepien2000

    6 жыл бұрын

    Dr. Peyam's Show Thank you, I love your videos, keep up with great work!

  • @loveen3186
    @loveen31863 жыл бұрын

    great teacher

  • @brandonpanuco8546
    @brandonpanuco85462 жыл бұрын

    Thanks, im preparing to take my final.

  • @drpeyam

    @drpeyam

    2 жыл бұрын

    Good luck!!!

  • @mohammedmadani7277
    @mohammedmadani72773 жыл бұрын

    I love dr peyam

  • @nawelouahrani9588
    @nawelouahrani95883 жыл бұрын

    This guy is so cute, makes me want to learn more !!

  • @DrJessicaGrogan
    @DrJessicaGrogan5 жыл бұрын

    Are the signs on your null spaces for the Eigen vectors supposed to be switched?

  • @DrJessicaGrogan

    @DrJessicaGrogan

    5 жыл бұрын

    Wait, seeing it doesn't matter because the difference is just scaling by -1

  • @lulinchuan5281
    @lulinchuan5281 Жыл бұрын

    such a pity not being able to meet u at berkeley!watch your video for both math110 and ee120(matrix exponential)

  • @drpeyam

    @drpeyam

    Жыл бұрын

    I love 110

  • @jimnewton4534
    @jimnewton45349 ай бұрын

    do you have an example video where you diagonalize a matrix with a 0 eigenvalue or with eigvenvalues of non-1 multiplicity?

  • @wankar0388
    @wankar03886 жыл бұрын

    Yeeaah !

  • @nouralhuda3530
    @nouralhuda35302 ай бұрын

    Thank you

  • @Contradi
    @Contradi6 жыл бұрын

    I don't know if the Legend of Zelda video you talked about is up, but does the analogy have to do with the Temple of Time in Ocarina? I won't spoil the analogy if that's it, but I have a hunch.

  • @drpeyam

    @drpeyam

    6 жыл бұрын

    Will be posted on Thursday 😜

  • @Contradi

    @Contradi

    6 жыл бұрын

    Dr. Peyam's Show can't wait!

  • @plaustrarius
    @plaustrarius6 жыл бұрын

    eigenventors, meaning that the output vector of the transformation is in the same direction as the input vector. that's implied when you said the matrix minus (eigenvalue) x (identity matrix) is another matrix whose null space is non zero. what is my transformation rotates all of the inputs? this means your eigenvalues would be imaginary, with the eigenvectors having imaginary components themselves. Do hyper complex numbers show up for higher dimensional transformations? I would assume so, since you would need more distinct eigenvectors for transformations of higher dimensional space. I hate calling them imaginary numbers, this is such a natural development and use of them, its hardly imaginary at all.

  • @jacobvandijk6525
    @jacobvandijk65252 жыл бұрын

    What are you hiding behind that permanent smile? Uncertainty? A cruel parent? Naivety? Real happiness? Or what?

  • @eljonaballa6853
    @eljonaballa68533 жыл бұрын

    My exam is tomorrow and here I am btw thank you for this video

  • @cicciobombo7496
    @cicciobombo74966 жыл бұрын

    0:50 (A)li-A *TU TU TU TU TUM TUM TUM*

  • @omardelacruz9442
    @omardelacruz94423 жыл бұрын

    nice

  • @jessiemanopo
    @jessiemanopo6 жыл бұрын

    What is the nul (matrix)?

  • @tofu8676

    @tofu8676

    5 жыл бұрын

    let A be a matrix then nul(A) (=nullspace of A or kernel of A) is the vectorspace of all vectors which multiplied with A would yield the nullvector. So if x is in nul(A) then Ax=0 (vectors)

  • @meh7272
    @meh72725 жыл бұрын

    Like to dislike ratio is quite large as of now [210/0]. Its so large that we can't even comprehend it XD.

  • @MrRomulocunha
    @MrRomulocunha5 жыл бұрын

    I'm sure you know it, but just one trick to help people find eigenvalues faster in this case, as you can notice the sum of columns is 3, which indicates one of the eigenvalues is 3, and the main diagonal tells us the sum of the eigenvalues is 7, so the other eigenvalue must be 5.

  • @jagadishkumarmr531

    @jagadishkumarmr531

    Жыл бұрын

    Wait, this works!! But how?

  • @MrRomulocunha

    @MrRomulocunha

    Жыл бұрын

    @@jagadishkumarmr531by definition, Av=lambda*v. Assume you have a matrix which all entrances are a multiple of k. Then you can factor out the k so you will end up with a k*A which is exactly the definition of eigenvalues

  • @douro20
    @douro206 жыл бұрын

    I haven't done anything with matrices in years...

  • @yuvalpaz3752
    @yuvalpaz37526 жыл бұрын

    Do I have hope to get what that was promised... ?

  • @drpeyam

    @drpeyam

    6 жыл бұрын

    I’ve got videos lined up until mid-October, and that one is not one of them :/

  • @yuvalpaz3752

    @yuvalpaz3752

    6 жыл бұрын

    Guess I will have to watch your video till mid-October then

  • @holyshit922
    @holyshit9226 жыл бұрын

    ... but not always diagonalization is possible Maybe something about Jordan form ? Jordan form is generalization of diagonalization

  • @drpeyam

    @drpeyam

    6 жыл бұрын

    There’s a video about that :)

  • @holyshit922

    @holyshit922

    6 жыл бұрын

    If you presented Jordan form correctly viewers should not have problems with diagonalization but i dont thik that 23 minutes is enough to present all cases

  • @Arycke

    @Arycke

    6 жыл бұрын

    Jacek Soplica Implying he didn't present it correctly. Both videos are simple to follow along with, albeit my main study is mathematics so I am quite biased. These videos aren't meant to be 100% comprehensive of everything except the individual problems or derivations of formulae. E.g. this and the Jordan form video serve to stimulate the viewer to delve deeper, to learn the basic methodology and terminology, and cover enough of the basics to get the viewer going in the correct direction. Also, one could try their own problem and find out that their matrix is defective and then investigate that as that is a lengthy subject to cover for beginners in a short video. The title is "How to Diagonalize," not "A Treatise on the Entirety of Matrix Diagonalization and Generalizations Thereof."

  • @holyshit922

    @holyshit922

    6 жыл бұрын

    I saw both his videos and videos from MIT and i think that videos from MIT are recorded better Jordan form was deleted from MIT but i still can compare other videos I had basics of analysis (functions, sequences,series, limits,single variable calculus ) on my high school I read on forums that they have deleted it lately from teaching program

  • @Arycke

    @Arycke

    6 жыл бұрын

    Jacek Soplica Well you are entitled to think that. I don't know why you would speak of your freedom to compare videos here where it is practically irrelevant. What you said is akin to someone saying "Burger King nuggets are better" while stuffing their face with McDonald's chicken mcnuggets. Additionally, I and many others have had just as many ( or more) courses in high school than what you've described on top of their own personal endeavors. I don't see what that has to do with your original statement, so I'll write this off as a miscommunication due to a possible language and/or cultural difference. We all like mathematics and that's the most important thing my boi 💜 let's just keep it copacetic and watch any math stuff we want as we do and enjoy Dr. Peyam's enthusiasm and intelligence. Ya? :3

  • @aneeshsrinivas892
    @aneeshsrinivas8923 жыл бұрын

    Here we go eigen

  • @raichu56k
    @raichu56k4 жыл бұрын

    if eigen do it, so can you !!!!!

  • @YorangeJuice
    @YorangeJuice2 жыл бұрын

    i never liked doing diagonalization (especially orthogonal diagonalization), problems because they take soooooo long and are so tedious

  • @cryptobeanbag7148
    @cryptobeanbag71484 жыл бұрын

    Funny guy

  • @Rundas69420
    @Rundas694206 жыл бұрын

    What's the difference between an algebra-student and a trigonometry-student? Algebra one makes sign mistanes where the trig one makes sin mistakes. I'm going to bury myself for that one xD

  • @cameronspalding9792
    @cameronspalding97925 жыл бұрын

    I thought the characteristic equation was det(A-lambda I)

  • @drpeyam

    @drpeyam

    5 жыл бұрын

    They’re the same since we’re setting it equal to 0

  • @avdrago7170
    @avdrago71706 жыл бұрын

    When did you actually explain how to diagonalize a matrix?

  • @drpeyam

    @drpeyam

    6 жыл бұрын

    This whole process of finding eigenvalues/eigenvectors is called diagonalization

  • @6612770

    @6612770

    6 жыл бұрын

    I totally agree with AV Drago. This is the first session from Dr P. that I been left asking myself "Whaaaaaat?".

  • @justwest
    @justwest6 жыл бұрын

    1337 views and 123 likes, lol

  • @ib9rt
    @ib9rt5 жыл бұрын

    You didn't demonstrate that A = PDP^-1 at the end? More significantly, you didn't demonstrate why this procedure works. It's like doing math by rote, without understanding.

  • @drpeyam

    @drpeyam

    5 жыл бұрын

    That wasn’t the point of the video anyway!

  • @halbmannhalbsib9881

    @halbmannhalbsib9881

    5 жыл бұрын

    for intuition on the topic u can watch the videos done by 3b1b

  • @nursultanbaitenov7505

    @nursultanbaitenov7505

    2 жыл бұрын

    @@drpeyam you didnt solve P of -1

  • @AlessioAlessi
    @AlessioAlessi Жыл бұрын

    You don't actually need to calculate that determinant for 2x2 matrices. You just need the matrix determinant and its trace and you can write down straightforward the characteristic polynomial 😌