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Marcus Mohr authored
- PETScExportOperatorMatrix.hpp contains a templated function that allows exporting an arbitrary operator to a file as matrix via PETSc. - PETScSparseMatrix.hpp now contains a variant of the method applyDirichletBCSymmetrically() which does only modify the matrix itself, but not the RHS. So we need not pass any vectors. - exportOperatorMatrix.cpp is a demo app that allows exporting some of our constant operators
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