LU Decomposition Using Elementary Matrices

This video explains how find the LU Decomposition of a square matrix using elementary matrices.

[theman]

wow buddy crystal clear explanation, if only my prof could teach this
THXS a million

[kristincotton]

What? You make this so easy. Thank you so much for clarifying what my "Theory of Matrices" professor could not.

[GodronATX]

Wow this guy is insane... i have my test in a few hours and ur coming up clutch

[naoh]

Thank u so much. you have just saved my butt... my midterm in 2 hour...thank u again 

[elizabethmstudios]

This video cleared all the confusion I had, Thanks a lot Man!!

[dangerousangel]

I just figured out how to find the inverse of a matrix on my calculator and that I can convert the decimal notation to fractions as well. :) Useful little tip.

[ArdianUmam]

In 4:51, why are diagonal values of matrix L not all one? (L2, 2 = 1/4 in this case).
Whereas, in your shortcut way calculating LU video, matrix L should have all one diagonal values.

[sohilverma]

at 3:32 we got E1 . But according to definition elementary matrix are matrix obtained by performing only 1 row operation on identity matrix . But there we performed 2 operation on identity matrix. So how can we say it is still elementary matrix ? or am i missing something ?

[Captain_Rhodes]

man matrices has to be the most boring topic in all of maths (apart from statistics obviously) how anyone can find this interesting is beyond me. Thanks for the video. very well explained

[alwaysisnever]

the explanation of the concept is great

[militantpacifist]

The quote at the end is funny if you think about it after you take a math exam.

[lukejones]

Great video!
However the elementary matrices at the top at 9:05 have been written in reverse order

[joecookieee]

9:08 E3 and E1 are out of order on the top line

[abdullahiibrahim]

God bless u for this clear explanations. however, i think there is a little mistake. The inverse of E1 doesn't seem to be correct

[a.abayomi]

thank u so much. i was confused initially, bt now i got it right

[barakgizelgil]

Thank you that's was great, but I have 1 question please- do you calculate the inverse of E as usual ? with the I matrix ? or there is a shortcut for it ?

[mizimomaya]

So the diagonal of L doesn’t necessarily need to be always 1?

[gokhansahin]

I really appreciated it, excellent video!

[luojihencha]

Could some one help me? I think the order of elementry matrix not right at 9:13 the first equation.

[amatullarice]

Question is LU Decomposition the same as LU Factorization?