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Truncated simplectic honeycomb : ウィキペディア英語版
Cyclotruncated simplectic honeycomb
In geometry, the cyclotruncated simplectic honeycomb (or cyclotruncated n-simplex honeycomb) is a dimensional infinite series of honeycombs, based on the symmetry of the , and is represented by a Coxeter-Dynkin diagram as a cyclic graph of ''n+1'' nodes with two adjacent nodes ringed. It is composed of n-simplex facets, along with all truncated n-simplices.
It is also called a Kagome lattice in two and three dimensions, although it is not a lattice.
In n-dimensions, each can be seen as a set of ''n+1'' sets of parallel hyperplanes that divide space. Each hyperplane contains the same honeycomb of one dimension lower.
In 1-dimension, the honeycomb represents an apeirogon, with alternately colored line segments. In 2-dimensions, the honeycomb represents the trihexagonal tiling, with Coxeter graph . In 3-dimensions it represents the quarter cubic honeycomb, with Coxeter graph filling space with alternately tetrahedral and truncated tetrahedral cells. In 4-dimensions it is called a cyclotruncated 5-cell honeycomb, with Coxeter graph , with 5-cell, truncated 5-cell, and bitruncated 5-cell facets. In 5-dimensions it is called an cyclotruncated 5-simplex honeycomb, with Coxeter graph , filling space by 5-simplex, truncated 5-simplex, and bitruncated 5-simplex facets. In 6-dimensions it is called a cyclotruncated 6-simplex honeycomb, with Coxeter graph , filling space by 6-simplex, truncated 6-simplex, bitruncated 6-simplex, and tritruncated 6-simplex facets.
}_1
!Apeirogon
!
|120px
Yellow and cyan line segments
|- align=center
!2
!}_3
!quarter cubic honeycomb
!120px
Elongated
triangular antiprism
|160px160px
With yellow and blue tetrahedra,
and red and purple truncated tetrahedra
|- align=center
!4
!}_5
!Cyclotruncated 5-simplex honeycomb
!120px
!5-simplex, truncated 5-simplex,
bitruncated 5-simplex
|- align=center
!6
!}_7
!Cyclotruncated 7-simplex honeycomb
!
!7-simplex, truncated 7-simplex,
bitruncated 7-simplex
|- align=center
!8
!
== Projection by folding ==

The cyclotruncated (2''n''+1)- and 2''n''-simplex honeycombs and (2''n''-1)-simplex honeycombs can be projected into the n-dimensional hypercubic honeycomb by a geometric folding operation that maps two pairs of mirrors into each other, sharing the same vertex arrangement:
}_5
|
!}_9
|
!
|
|...
|-
!}_4
|
!}_8
|
!
|
|...
|-
!
|
!}_5
|
!}_9
|
|...
|-
!}_2
|
!}_4
|
!

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Cyclotruncated simplectic honeycomb」の詳細全文を読む



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