[petsc-users] Inverse matrix empty

[Немања Илић (Nemanja Ilic)]

Hello,

I want to get the inverse of a matrix. I use the following algorithm: I have input matrix (A), identity matrix (B) and I try to solve A * X = B, where X is the inverse matrix. I use MatMatSolve function. I included blas, fblas, and superlu libraries in my project but still I get empty inverse matrix. I factored A with LUFactor before calling MatMatSolve. What am I doing wrong?

Thank you in advance,
Regards,
Nemanja