LU Decomposition with Partial Pivoting | Lecture 26 | Numerical Methods for Engineers

[@isxp]

Taking my last math class to secure the minor along with my BSME degree. We just covered this topic on Monday; excellent timing on these videos. Thank you Dr. Chasnov!

[@blackasthesky]

I'm glad you are making these videos. Saved me more than once.

[@brucelau5359]

I really like the way you explain how MATLAB works and I really enjoy watching the video!!!! Great thanks

[@niiwontumi8042]

why did u interchange the 2nd and 3rd row of the lower triangular matrix at min 7:02 , is there something I'm missing🤔🤔🤔

[@AhmedAwaiz-ie3vw]

As U matrix's R2 and R3 were interchanged

[@bogdansofiea7563]

Hi great explanation but after checking the calculations i think at min 3:23 instead of M2M1P12A you should have written just M1P12A

[@bogdansofiea7563]

and then the result of U = P23 *M1*P12*A

[@ryanjackson0x]

How do you get the subscript 23 for P23, and how do you know it's its own inverse?

[@steady_search]

Probably a more formal proof than this; but given that this identity was offered by the prof, here is an example. I did cheat and use python, but I thought it might be weirder to put a matrix in a youtube comment😅 >>> import numpy as np >>> A = [[0, 1, 0], [1, 0, 0], [0, 0, 1]] >>> A [[0, 1, 0], [1, 0, 0], [0, 0, 1]] >>> B =np.copy(A) >>> np.matmul(A,B) array([[1, 0, 0], [0, 1, 0], [0, 0, 1]])

[@lanncerigs262]

Thank you! It helped me a lot!

[@stavtsechansky7864]

is this basically Cholesky decomposition ?

[@sammer1317]

Yo is he writing in reverse

[@Limbaugh_]

No

[@christophergaspar6520]

it's a reversed video we did this at our school too and i got to the glass board and how it worked

[@w-gabriel]

Those lectures are amazing.

[@Youknowwho-q4p]

Interesting but doesn’t sound like LU decomposition to me? Why there’s a inverse calculation in it

[@athanasehafashimana2586]

very nice

[@ElhamGholamipour]

I wonder how he calculated L .. any help?

[@azzatdeutschr5333]

i think he just saved it without anderstanding the right way to do

[@geniusmathematics9123]

Thnx sir

[@rajatsankhla8993]

Saviour!

[@beleggo4532]

Japper of Jappington

[@sattikbiswas2187]

This is Mike from Breaking bad

[@ismailsevimli6424]

Thanks Life saver :D

[@pavelsavelev2560]

ur smart

[@azzatdeutschr5333]

wrong explanation, very bad

[@manethbalasooriya222]

It wouldnt have killed you to do L?

[@steady_search]

Yeah that was a strange choice imo. I wonder if he's referencing a specific textbook's notation.