PERSON@1 's formula relating the number of edges , vertices , and faces of a convex polyhedron was studied and generalized by PERSON@2 and PERSON@3 , and is at the origin of topology .

PERSON@1 's formula was about the number of edges , vertices , and faces of a convex polyhedron was studied and generalized by PERSON@2 and PERSON@3 , and is at the origin of topology .
