I have a large sparse matrix A and have gotten its inverse matrix inv(A) . Then I need to change an element value to get a new matrix, A1. I am trying to get the inverse of A1. Is there any way to do it , rather than recalculate the inv(A1)? Could I get some benefits from A or inv(A)?
e.g. (not a sparse matrix)
A = magic(5);invA = inv(A);A1 = A;A1(1,5) = 1;invA1 = inv(A1);% is there any way to do this?
I know this may be a math problem. It seems impossible for me. I just would like to know other's viewpoints of it. Thank you.
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