/usr/ is in libhmat-oss-dev 1.2.0-2ubuntu1.
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..
/usr/include/hmat/hmat/config-oss.h
/usr/include/
/usr/include/hmat/
/usr/include/hmat/admissibility.hpp
/usr/include/hmat/assembly.hpp
/usr/include/hmat/cluster_tree.hpp
/usr/include/hmat/clustering.hpp
/usr/include/hmat/compression.hpp
/usr/include/hmat/coordinates.hpp
/usr/include/hmat/data_types.hpp
/usr/include/hmat/default_engine.hpp
/usr/include/hmat/full_matrix.hpp
/usr/include/hmat/h_matrix.hpp
/usr/include/hmat/hmat/
/usr/include/hmat/hmat/config.h
/usr/include/hmat/hmat/hmat.h
/usr/include/hmat/hmat_cpp_interface.hpp
/usr/include/hmat/tree.hpp
/usr/lib/
/usr/lib/cmake/
/usr/lib/cmake/hmat/
/usr/lib/cmake/hmat/HMATConfig.cmake
/usr/lib/cmake/hmat/HMATConfigVersion.cmake
/usr/lib/cmake/hmat/HMATLibraryDepends-relwithdebinfo.cmake
/usr/lib/cmake/hmat/HMATLibraryDepends.cmake
/usr/share/
/usr/share/doc/
/usr/share/doc/libhmat-oss-dev/
/usr/share/doc/libhmat-oss-dev/copyright
/usr/lib/libhmat-oss.so
/usr/share/doc/libhmat-oss-dev/changelog.Debian.gz