Sparse matrix multiplication

[StefanHubner]

It would be interesting to have a gmXv-like operation for the multiplication of two sparse matrices i.e. gmXgm. I realize this can be done column by column but it would be nice to have such an operator.

Also: Module Numeric.LinearAlgebra' does not export(!#>)'

[albertoruiz]

In version 0.16 the operator (!#>) was exported by Numeric.LinearAlgebra.HMatrix. In the more recent 0.17 it is exported by Numeric.LinearAlgebra:
https://hackage.haskell.org/package/hmatrix-0.17.0.1/docs/Numeric-LinearAlgebra.html#v:-33--35--62-

Yes, a gmXgm operator is interesting. We now have sparse matrix x dense vector, which is not ideal for the matrix-matrix case, but I will think about this. A basic implementation could be useful even if it is not fully optimized.

Thanks for your comment.