KSPSolve(), multiple rhs and preconditioner

[Yujie]

Hi, PETSc developers

I am wondering what the difference is when iterative preconditioners (such
as ILU, sparse approximation inverse and so on) are used in single and
multiple rhs using KSPSolve().

In multiple rhs case, the preconditioners are made to each rhs? Thanks a
lot.

Regards,

Yujie
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