Bitruncated 9-simplex
In geometry, a bitruncation is an operation on regular polytopes. It represents a Truncation (geometry), truncation beyond Rectification (geometry), rectification. The original Edge (geometry), edges are lost completely and the original Face (geometry), faces remain as smaller copies of themselves. Bitruncated regular polytopes can be represented by an extended Schläfli symbol notation or In regular polyhedra and tilings For regular polyhedron, polyhedra (i.e. regular 3-polytopes), a ''bitruncated'' form is the truncated Dual polyhedron, dual. For example, a bitruncated cube is a truncated octahedron. In regular 4-polytopes and honeycombs For a regular 4-polytope, a ''bitruncated'' form is a dual-symmetric operator. A bitruncated 4-polytope is the same as the bitruncated dual, and will have double the symmetry if the original 4-polytope is Dual polyhedron, self-dual. A regular polytope (or Honeycomb (geometry), honeycomb) will have its cells bitruncated into truncate ...
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