# matrices, inverses, transposes, r.r.e.f...

• Feb 13th 2009, 02:28 PM
James0502
matrices, inverses, transposes, r.r.e.f...
Ok.. I have a series of problems..

I have a square matrix, P, I also have a function, F, that computes < m x n matrix|m x m identity matrix>

I have to find F(P), F(Transpose(P)), F(P . Transpose(P)), F(Transpose (P) . P)

I also have to find their row reduced echelon forms and comment on their results

obviously some of these matrices are square, and so the row reduced echelon form of F finds their inverse.. but what about for those that arent square?

what are the comments I should be making?

many thanks
• Feb 15th 2009, 08:02 AM
James0502
a couple extra thoughts/questions..

I am aware that if you have a square matrix, H, and you row reduce the augmented matrix <H|I> You return with <I|InverseH>

is there a result for non square matrices?

And is there a result if you perform this with a non square matrix and its transpose - are the reults related?.

and what about if you carry this out on H . Transpose(H)

and then Transpose(H) . H of course these are square so you will end up with the inverse of each, but are these inverses related?

many thnaks