Hello,
I have a working matrix-based solver using Petsc vectors which i am
currently trying to transform to a matrix-free code. When I use the deal.ii
Matrix-free infrastructure with Petsc-vectors eg. using the
distribute_local_to_global function I get the following error message:
error: cannot convert ‘dealii::LinearAlgebraPETSc::MPI::Vector’ {aka
‘dealii::PETScWrappers::MPI::Vector’} to
‘dealii::LinearAlgebra::distributed::Vector<double,
dealii::MemorySpace::Host>&’
51 | system_matrix.initialize_dof_vector(system_rhs);
| ^~~~~~~~~~
I was wondering if there was a way of interfacing the Matrix-free
infrastructure to Petsc vectors or alternatively a method of copying a
dealii distributed vector to a Petsc MPI vector?
Many thanks,
Tom
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