Pyrorectichoron (EntityTopic, 11)
From Hi.gher. Space
m (→Images) |
(→Images: add stereographic projection) |
||
| Line 20: | Line 20: | ||
== Images == | == Images == | ||
| - | The following [[Petrie polygon]] | + | The following [[Petrie polygon]] and [[stereographic projection]] each highlight the same arrangement of two neighboring (at a point) tetrahedral cells in red and orange and the octahedral cell between them in blue: |
| - | <blockquote><[#embed [hash ZKCW86KPBE29PQQXSTB9M6TBCQ]]></blockquote> | + | <blockquote><[#embed [hash ZKCW86KPBE29PQQXSTB9M6TBCQ]]> <[#embed [hash CQCST077FMNDPQMWMFG5WG08X1] [height 240]]></blockquote> |
| - | + | In the Petrie polygon, as there are a total of 5 tetrahedra and 5 octahedra, the others can be obtained by rotating the above highlights by {{over|τ|5}}. | |
<[#polytope [id 128]]> | <[#polytope [id 128]]> | ||
{{Tetrashapes}} | {{Tetrashapes}} | ||
Revision as of 14:46, 13 March 2016
The pyrorectichoron is a uniform polychoron in the pyrotope family. Its cells are 5 tetrahedra and 5 octahedra.
The pyrorectichoron can be constructed as tetrahedron || octahedron, meaning it's also a segmentochoron, K4.5. Deleting any vertex from the pyrorectichoron forms the trigonal biantiprismatic ring, or K4.6, which can be constructed as trigonal prism || gyrated triangle. Deleting another vertex - specifically, one of the three from the gyrated triangle - will form the digonal gyrobicupolic ring, or K4.8.
Images
The following Petrie polygon and stereographic projection each highlight the same arrangement of two neighboring (at a point) tetrahedral cells in red and orange and the octahedral cell between them in blue:
In the Petrie polygon, as there are a total of 5 tetrahedra and 5 octahedra, the others can be obtained by rotating the above highlights by τ∕5.
Incidence matrix
Dual: (dual of pyrorectichoron)
| # | TXID | Va | Ea | 3a | 3b | C1a | C2a | Type | Name |
|---|---|---|---|---|---|---|---|---|---|
| 0 | Va | = point | ; | ||||||
| 1 | Ea | 2 | = digon | ; | |||||
| 2 | 3a | 3 | 3 | = triangle | ; tet-oct | ||||
| 3 | 3b | 3 | 3 | = triangle | ; oct-oct | ||||
| 4 | C1a | 4 | 6 | 4 | 0 | = tetrahedron | ; | ||
| 5 | C2a | 6 | 12 | 4 | 4 | = octahedron | ; | ||
| 6 | H4.1a | 10 | 30 | 20 | 10 | 5 | 5 | = pyrorectichoron | ; |
Usage as facets
This polytope does not currently appear as facets in any higher-dimensional polytopes in the database.
| Notable Tetrashapes | |
| Regular: | pyrochoron • aerochoron • geochoron • xylochoron • hydrochoron • cosmochoron |
| Powertopes: | triangular octagoltriate • square octagoltriate • hexagonal octagoltriate • octagonal octagoltriate |
| Circular: | glome • cubinder • duocylinder • spherinder • sphone • cylindrone • dicone • coninder |
| Torii: | tiger • torisphere • spheritorus • torinder • ditorus |
