Polytopes of Type {4,4,21}

This page is part of the Atlas of Small Regular Polytopes
(See Other Polytopes of Rank 4)

There are 2 polytopes of this type in this atlas. They are :
  1. {4,4,21}*1344a (SmallGroup(1344,6453)) (Universal)
  2. {4,4,21}*1344b (SmallGroup(1344,11399)) (Universal)