[petsc-users] Retrieving the L U factors

Zin Lin zinlin.zinlin at gmail.com
Mon Jul 27 10:04:35 CDT 2015


I would like to know how I can retrieve the lower triangular matrix
(possibly permuted or preferably the inverse of L) and the upper triangular
matrix (preferably the inverse of U) from the LU factorization done by an
external package (such as MUMPS).
I need them to build a preconditioner of a much larger size for a 3D


Zin Lin
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