Joon Hee Choi <[email protected]> writes: > Dear Hong, > > Thank you for your reply. I think it reduces the number of flops to > use a seqaij matrix C because I will use very large sparse matrix for > A and also multiply C and another large matrix.
Joon, if A is sparse with at least one nonzero per row, and B is a dense matrix, then C = A*B is not sparse in the sense that literally every entry is nonzero.
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