/usr/share/ is in surf-alggeo-doc 1.0.6+ds-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc-base/
/usr/share/doc-base/surf-alggeo
/usr/share/doc/
/usr/share/doc/surf-alggeo-doc/
/usr/share/doc/surf-alggeo-doc/copyright
/usr/share/doc/surf-alggeo-doc/TODO
/usr/share/doc/surf-alggeo-doc/NEWS.gz
/usr/share/doc/surf-alggeo-doc/examples/
/usr/share/doc/surf-alggeo-doc/examples/useless_but_nice/
/usr/share/doc/surf-alggeo-doc/examples/useless_but_nice/9surfaces.pic
/usr/share/doc/surf-alggeo-doc/examples/useless_but_nice/cut_with_plane.pic
/usr/share/doc/surf-alggeo-doc/examples/useless_but_nice/colored_light.pic
/usr/share/doc/surf-alggeo-doc/examples/useless_but_nice/2surface2curves.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/
/usr/share/doc/surf-alggeo-doc/examples/curves/g8.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/g4.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/parabola.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/hyperbola.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/cubic-anim.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/g12.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/elliptic.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/neil.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/g5.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/g6.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/g10.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/g9.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/g3.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/g7.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/newton.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/g11.pic
/usr/share/doc/surf-alggeo-doc/examples/curves/multicurve.pic
/usr/share/doc/surf-alggeo-doc/examples/surfaces/
/usr/share/doc/surf-alggeo-doc/examples/surfaces/sextic.pic
/usr/share/doc/surf-alggeo-doc/examples/surfaces/steiner.pic
/usr/share/doc/surf-alggeo-doc/examples/surfaces/sextic3d.pic
/usr/share/doc/surf-alggeo-doc/examples/surfaces/clebsch.pic
/usr/share/doc/surf-alggeo-doc/examples/surfaces/sextic_planes.pic
/usr/share/doc/surf-alggeo-doc/examples/surfaces/cyclide.pic
/usr/share/doc/surf-alggeo-doc/examples/surfaces/quintic.pic
/usr/share/doc/surf-alggeo-doc/examples/surfaces/clebsch27lines.pic
/usr/share/doc/surf-alggeo-doc/examples/surfaces/sextic_transparent.pic
/usr/share/doc/surf-alggeo-doc/examples/surfaces/decic.pic
/usr/share/doc/surf-alggeo-doc/examples/new/
/usr/share/doc/surf-alggeo-doc/examples/new/kummer.pic
/usr/share/doc/surf-alggeo-doc/examples/new/cubic_co.pic
/usr/share/doc/surf-alggeo-doc/examples/new/ellipsoidcut.pic
/usr/share/doc/surf-alggeo-doc/examples/background.pic
/usr/share/doc/surf-alggeo-doc/surf-alggeo.html
/usr/share/doc/surf-alggeo-doc/README
/usr/share/doc/surf-alggeo-doc/AUTHORS
/usr/share/doc/surf-alggeo-doc/changelog.Debian.gz
/usr/share/doc/surf-alggeo-doc/surf-alggeo.pdf