[petsc-users] Dense Matrix setting local rows / local columns Question

[James A Charles]

For this multiplication it is a dense matrix of size Nxp (Where N >> p) with a matrix of size pxp. If dense-sparse works my workaround could be to store the pxp matrix as sparse since it never gets very large anyways (and its triangular). And I don't need direct access to its data array. 

So to summarize what I think I have learned: 
For MatMatMult in parallel sparse-dense, dense-sparse, and sparse-sparse works? And dense-dense does not because you have switched to Elemental and that has a different API that must be used? 

----- Original Message -----
From: "Jed Brown" <jedbrown at mcs.anl.gov>
To: "James A Charles" <charlesj at purdue.edu>, "Matthew Knepley" <knepley at gmail.com>
Cc: petsc-users at mcs.anl.gov
Sent: Friday, October 18, 2013 1:42:04 PM
Subject: Re: [petsc-users] Dense Matrix setting local rows / local columns Question

James A Charles <charlesj at purdue.edu> writes:

> Thank you all for the responses. I was able to figure out the issue
> with the dense matrix. I had another question related to dense
> matrices. Does there exist support for multiplication of a sparse A
> and dense B matrix matrix multiplication in parallel? I'm using Petsc
> Release Version 3.4.2 and I am getting an error "No support for this
> operation for this object type! MatMatMult not supported for B of type
> mpidense" 

It should be supported.  Please send the entire error message.  (Always
send the entire error message.)