Monostatic polytope


In geometry, a monostatic polytope is a d-polytope which "can stand on only one face". They were described in 1969 by J.H. Conway, M. Goldberg and R.K. Guy. The monostatic polytope in 3-space they constructed has 19 faces. In 2012, Andras Bezdek discovered an 18 face solution, and in 2014, Alex Reshetov published a 14 face object.

Definition

A polytope is called monostatic if, when filled homogeneously, it is stable on only one facet. Alternatively, a polytope is monostatic if its centroid has an orthogonal projection in the interior of only one facet.

Properties