[petsc-users] some beginner questions : matrix multiplication

[lixin chu]

Hello,I am new to PETsc, and I am looking for a library to support matrix multiplication. I have several questions and would like to confirm:
1. From MatMatMult API, for C=A*B, I assume we can support mixed sparse and dense matrix, i.e., either A or B can be dense; similarly, MatMatMatMult (A*B*C) can support A and C sparse, and B is dense.
2. We can also use mixed data type for MatMatMult/MatMatMatMult, for example, A is complex, double, and B is double.
3. Is there a way to estimate the total working memory required for MatMatMult/MatMatMatMult, given A,B and C information (like dimensions, and total none zero elements, data type) 4. do we have any performance/memory usage data when compared with other sparse matrix multiplication solutions. for example. PSBLAS ?
thank you very much,
lixin
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