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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Hello, Originally Posted by Noxide Just double checking... Row 3 multiplied by (-1) is represented by an identity matrix with I33 = -1, correct? Yes and it's inverse is just the identity matrix? No, its inverse is itself. Just check the multiplication
Thanks, I though that was the case. I know that P32's inverse is P32, but should I even bother writing the -1 superscript?
Originally Posted by Noxide Thanks, I though that was the case. I know that P32's inverse is P32, but should I even bother writing the -1 superscript? You realize, don't you, that no one has any idea what you mean by "P32"?
Oh, I thought it was a convention that Pxy was a permutation matrix.
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