/usr/ is in libwfmath-0.3-dev 0.3.12-3ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/wfmath-0.3/
/usr/include/wfmath-0.3/wfmath/
/usr/include/wfmath-0.3/wfmath/atlasconv.h
/usr/include/wfmath-0.3/wfmath/vector.h
/usr/include/wfmath-0.3/wfmath/stream.h
/usr/include/wfmath-0.3/wfmath/rotmatrix_funcs.h
/usr/include/wfmath-0.3/wfmath/point_funcs.h
/usr/include/wfmath-0.3/wfmath/shuffle.h
/usr/include/wfmath-0.3/wfmath/polygon.h
/usr/include/wfmath-0.3/wfmath/point.h
/usr/include/wfmath-0.3/wfmath/intersect.h
/usr/include/wfmath-0.3/wfmath/miniball.h
/usr/include/wfmath-0.3/wfmath/rotbox_funcs.h
/usr/include/wfmath-0.3/wfmath/MersenneTwister.h
/usr/include/wfmath-0.3/wfmath/wrapped_array.h
/usr/include/wfmath-0.3/wfmath/wfmath.h
/usr/include/wfmath-0.3/wfmath/vector_funcs.h
/usr/include/wfmath-0.3/wfmath/quaternion.h
/usr/include/wfmath-0.3/wfmath/timestamp.h
/usr/include/wfmath-0.3/wfmath/ball.h
/usr/include/wfmath-0.3/wfmath/const.h
/usr/include/wfmath-0.3/wfmath/intersect_decls.h
/usr/include/wfmath-0.3/wfmath/axisbox.h
/usr/include/wfmath-0.3/wfmath/segment.h
/usr/include/wfmath-0.3/wfmath/axisbox_funcs.h
/usr/include/wfmath-0.3/wfmath/randgen.h
/usr/include/wfmath-0.3/wfmath/polygon_funcs.h
/usr/include/wfmath-0.3/wfmath/ball_funcs.h
/usr/include/wfmath-0.3/wfmath/error.h
/usr/include/wfmath-0.3/wfmath/probability.h
/usr/include/wfmath-0.3/wfmath/segment_funcs.h
/usr/include/wfmath-0.3/wfmath/rotbox.h
/usr/include/wfmath-0.3/wfmath/int_to_string.h
/usr/include/wfmath-0.3/wfmath/zero.h
/usr/include/wfmath-0.3/wfmath/rotmatrix.h
/usr/include/wfmath-0.3/wfmath/miniball_funcs.h
/usr/include/wfmath-0.3/wfmath/polygon_intersect.h
/usr/share/
/usr/share/doc/
/usr/share/doc/libwfmath-0.3-dev/
/usr/share/doc/libwfmath-0.3-dev/copyright
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/wfmath-0.3.pc
/usr/share/doc/libwfmath-0.3-dev/changelog.Debian.gz
/usr/lib/x86_64-linux-gnu/libwfmath-0.3.so