Assertion: polyhedron | /r/HasProperty | parallelohedron
Facets:
Source sentences:
text: In order for a polyhedron to be a parallelohedron, it is necessary and sufficient that it be a convex polyhedron of one of the five indicated topological types and that all of its faces have centers of symmetry.
text: In order for a polyhedron to be a parallelohedron, it is necessary and sufficient that it be a convex polyhedron of one of the five indicated topological types and that all of its faces have centers of symmetry.
text: In order for a polyhedron to be a parallelohedron, it is necessary and sufficient that it be a convex polyhedron of one of the five indicated topological types and that all of its faces have centers of symmetry.