Just double checking...

Row 3 multiplied by (-1)

is represented by an identity matrix with I33 = -1, correct?

and it's inverse is just the identity matrix?

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- Jan 27th 2010, 11:41 AMNoxide[SOLVED] Elementary Matrix
Just double checking...

Row 3 multiplied by (-1)

is represented by an identity matrix with I33 = -1, correct?

and it's inverse is just the identity matrix? - Jan 27th 2010, 11:48 AMMoo
- Jan 27th 2010, 11:58 AMNoxide
Thanks, I though that was the case.

I know that P32's inverse is P32, but should I even bother writing the -1 superscript? - Jan 28th 2010, 01:26 AMHallsofIvy
- Jan 28th 2010, 09:45 AMNoxide
Oh, I thought it was a convention that Pxy was a permutation matrix.