<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Dear developers,<br>
I have the following question:<br>
<br>
Imagine that I have two matrices A and B<br>
Both are created using <a
href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Mat/MatCreateSeqAIJ.html#MatCreateSeqAIJ">MatCreateSeqAIJ</a>(<a
href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/MPI_Comm.html#MPI_Comm">MPI_Comm</a>
comm,<a
href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscInt.html#PetscInt">PetscInt</a>
m,<a
href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscInt.html#PetscInt">PetscInt</a>
n,<a
href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscInt.html#PetscInt">PetscInt</a>
nz,const <a
href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscInt.html#PetscInt">PetscInt</a>
nnz[],<a
href="http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Mat/Mat.html#Mat">Mat</a>
*A)<br>
with the same first 5 arguments.<br>
In addition, for both matrices I call<br>
MatSetOption(A,MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_TRUE);<br>
<br>
After this I set some entries to both A and B matrices and assemble
them.<br>
Question: can I use MatAXPY with SAME_NONZERO_PATTERN argument?<br>
Thank you,<br>
Michael.<br>
<pre class="moz-signature" cols="72">--
Michael Povolotskyi, PhD
Research Assistant Professor
Network for Computational Nanotechnology
Hall for Discover and Learning Research, Room 441
West Lafayette, IN 47907
Phone (765) 4949396
</pre>
</body>
</html>