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<pre><div style="text-align: left; text-indent: 0px; white-space: pre-wrap; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Frank,</div><div style="text-align: left; text-indent: 0px; white-space: pre-wrap; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">We do not have support of MatMatMult() for BAIJ*BAIJ matrices. For BAIJ matrix, we only support BAIJ*DENSE. You may have to convert BAIJ to AIJ to use MatMatMult().</div><div style="text-align: left; text-indent: 0px; white-space: pre-wrap; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Hong</div></pre>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> petsc-users <petsc-users-bounces@mcs.anl.gov> on behalf of Frank Bramkamp <bramkamp@nsc.liu.se><br>
<b>Sent:</b> Wednesday, May 29, 2024 9:23 AM<br>
<b>To:</b> petsc-users <petsc-users@mcs.anl.gov><br>
<b>Subject:</b> [petsc-users] Question on MatMatmult</font>
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Dear PETSc Team, I would like to make a matrix-matrix product of two matrices. I try to use CALL MatMatMult(Mat_A,MAT_B,MAT_INITIAL_MATRIX,PETSC_DEFAULT_REAL,MAT_AB,IERROR). // calling from fortran When I try to use this function I get the
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<pre style="font-family:sans-serif; font-size:100%; white-space:pre-wrap; word-wrap:break-word">Dear PETSc Team,
I would like to make a matrix-matrix product of two matrices.
I try to use
CALL MatMatMult(Mat_A,MAT_B,MAT_INITIAL_MATRIX,PETSC_DEFAULT_REAL,MAT_AB,IERROR). // calling from fortran
When I try to use this function I get the following error message:
"Unspecified symbolic phase for product AB with A seqbaij, B seqbaij. The product is not supported”
I am using the seqbaij matrix format. Is MatMatMult and MatProductSymbolic
only defined for the standard point-wise matrix format but not for a blocked format ?!
In the documentation, I could not see a hint on supported matrix formats or any limitations.
The examples also just use a point-wise format (AIJ), as I can see so far.
Greetings, Frank Bramkamp
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