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My homework is too difficult for me! - Judgment - 03-12-2004
Mirinee Wrote:I'm confused about LU factorisation of a m x n matrix and how to visualise the 4 fundamental subspaces (null, left null, row, column).
:S *Head Explodes*
My homework is too difficult for me! - Dkgamer - 03-12-2004
Here ya go Fundamental subspaces of a matrix
Have a read of this and see if it helps.
My homework is too difficult for me! - Mirinee - 03-12-2004
*Casts Reverser*
Hahaha. So did mine. I'm trying to adapt so that it doesn't. *Eats more mind mats*
Edit: And thanks, Dkgamer. I don't have the TI-86. I need to understand how to do it manually.
My homework is too difficult for me! - Dkgamer - 03-12-2004
Oh ok, sorry about that. Il try and sort of translate it into simpler terms so you can see how it works. Just give me a while and il put up a link if i manage it lol
My homework is too difficult for me! - Mirinee - 03-12-2004
Wait, there's a bit at the end which tells how to do it manually, more or less.
I'm more stuck on how to apply the null-space once it is obtained, or how to work backwards to get a matrix when given the null-space and column-space bases.
I really need to understand the physical interpretation. It's going to be a challenge to explain to me in simple terms :'( .
Edit: What's a pivot column?
My homework is too difficult for me! - Dkgamer - 03-12-2004
Hmmm im not really sure how to find out the matrix from a NS and CS either. Ill do some research and let you know what i find out
My homework is too difficult for me! - Kal - 24-12-2004
sorry i can't help u, i'm only in basic algebra, and barley past my final in that, with a calculator.
( it probly dosen't help that i'm asleep half the time :$ )