<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">Zin:</div><div class="gmail_quote">See </div><div class="gmail_quote">petsc/src/mat/examples/tests/ex130.c</div><div class="gmail_quote">petsc/src/ksp/ksp/examples/tutorials/ex52.c</div><div class="gmail_quote"><br></div><div class="gmail_quote">Hong</div><div class="gmail_quote"><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi<div><br></div><div>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). </div><div>I need them to build a preconditioner of a much larger size for a 3D problem.</div><div><br></div><div>Thanks,</div><div>Zin<span class="HOEnZb"><font color="#888888"><br clear="all"><div><br></div>-- <br><div><div dir="ltr">Zin Lin<br><br></div></div>
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