e/Schönhardt polyhedron

Information
has gloss	eng: In geometry, the Schönhardt polyhedron is the smallest non-convex polyhedron that cannot be triangulated into tetrahedra without adding new vertices. It is named after German mathematician Erich Schönhardt, who first described it in 1928.
lexicalization	eng: Schönhardt polyhedron
instance of	c/Nonconvex polyhedra

Media
media:img	Schönhardt polyhedron.svg