Possible issues with solving iterative linear systems with mldivide

Hi,

I have a 62x62 coefficient matrix that remains constant, and the right-hand-side input vector gets updated non-linearly in a different part of the iteration. I'm using the mldivide shorthand to solve the system. I have verified the values in both the coefficient matrix and input vector. As I iterate, the solutions are pushed towards zero and converge at very small values (e.g., 10^-11 or 10^-39). The expected solution should be around 10^-2. Would anyone have any suggestions as to what's happening? Is there a way to see the matrix solver steps to see which expressions might have an issue?

Thank you for your time.

Answer 1

[Bruno Luong]

"Is there a way to see the matrix solver steps to see which expressions might have an issue?"

No they are LAPACK/BLAS based codes, developped in low language, higlly optimized, by highly skilled people and they resist to various tests since few dozen of years.