Polytopes of Type {4,21,4}

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

There are 3 polytopes of this type in this atlas. They are :
  1. {4,21,4}*672 (SmallGroup(672,1265)) (Universal)
  2. {4,21,4}*1344a (SmallGroup(1344,11703)) (Universal)
  3. {4,21,4}*1344b (SmallGroup(1344,11703)) (Universal)