On 12/28/23 12:22, Simon wrote:
I want to build the scalar product between rows of a
TrilinosWrappers::SparseMatrix and a TrilinosWrappers::MPI::Vector.
This sounds like you're computing a matrix-vector product -- the dot products
you compute are the elements of the resulting vector.
As you have learned, it isn't entirely trivial to determine how information
must be transmitted in parallel for these kinds of operations. But it is also
not necessary: The parallel matrix classes all have matrix-vector ("vmult")
operations implemented. Why not use those?
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
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