3 21 polytope
id:
3-21-polytope-280-7675894
title:
3 21 polytope
text:
In 7-dimensional geometry, the 321 polytope is a uniform 7-polytope, constructed within the symmetry of the E7 group. It was discovered by Thorold Gosset, published in his 1900 paper. He called it an 7-ic semi-regular figure. Its Coxeter symbol is 321, describing its bifurcating Coxeter-Dynkin diagram, with a single ring on the end of one of the 3-node sequences. The rectified 321 is constructed by points at the mid-edges of the 321. The birectified 321 is constructed by points at the triangle f
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/3_21_polytope
date created:
date modified:
2023-09-03T19:06:04Z
main entity:
{"identifier":"Q4636457","url":"https://www.wikidata.org/entity/Q4636457"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/8/83/Up2_3_21_t0_E7.svg","width":2000,"height":2000}
fields total:
13
integrity:
14