/usr/include/dune/pdelab/backend/istl.hh is in libdune-pdelab-dev 2.5.0~rc1-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | #ifndef DUNE_PDELAB_BACKEND_ISTL_HH
#define DUNE_PDELAB_BACKEND_ISTL_HH
#include <dune/pdelab/backend/istl/vector.hh>
#include <dune/pdelab/backend/istl/bcrsmatrix.hh>
#include <dune/pdelab/backend/istl/bcrsmatrixbackend.hh>
#include <dune/pdelab/backend/istl/istlsolverbackend.hh>
#include <dune/pdelab/backend/istl/seq_amg_dg_backend.hh>
#include <dune/pdelab/backend/istl/ovlp_amg_dg_backend.hh>
#include <dune/pdelab/backend/istl/cg_to_dg_prolongation.hh>
#include <dune/pdelab/backend/istl/utility.hh>
#endif // DUNE_PDELAB_BACKEND_ISTL_HH
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