[petsc-dev] How to do LU factorization using SuperLU_dist and reuse the factorization?

[Lulu Liu]

 I have to solve linear problems like Ax=b many times, and all of linear
problems have the same A but b is different.

My goal is to do A=LU using SuperLU_DIST，and then reuse this LU
factorization to solve Ly=b, Ux=y.

How to do it ? How to implement it more efficiently?

Thanks!

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