9-polytope
Encyclopedia
Graphs of three regular and related uniform polytope
Uniform polytope
A uniform polytope is a vertex-transitive polytope made from uniform polytope facets of a lower dimension. Uniform polytopes of 2 dimensions are the regular polygons....

s

9-simplex

Rectified 9-simplex
Rectified 9-simplex
In nine-dimensional geometry, a rectified 9-simplex is a convex uniform 9-polytope, being a rectification of the regular 9-simplex.These polytopes are part of a family of 271 uniform 9-polytopes with A9 symmetry....


Truncated 9-simplex

Cantellated 9-simplex

Runcinated 9-simplex

Stericated 9-simplex

Pentellated 9-simplex

Hexicated 9-simplex

Heptellated 9-simplex

Octellated 9-simplex

9-orthoplex

9-cube

Truncated 9-orthoplex

Truncated 9-cube

Rectified 9-orthoplex
Rectified 9-orthoplex
In nine-dimensional geometry, a rectified 9-simplex is a convex uniform 9-polytope, being a rectification of the regular 9-orthoplex.There are 9 rectifications of the 9-orthoplex. Vertices of the rectified 9-orthoplex are located at the edge-centers of the 9-orthoplex. Vertices of the birectified...


Rectified 9-cube
Rectified 9-cube
In nine-dimensional geometry, a rectified 9-cube is a convex uniform 9-polytope, being a rectification of the regular 9-cube.There are 9 rectifications of the 9-cube. The zeroth is the 9-cube itself, and the 8th is the dual 9-orthoplex. Vertices of the rectified 9-cube are located at the...


9-demicube

Truncated 9-demicube

In nine-dimensional geometry
Geometry
Geometry arose as the field of knowledge dealing with spatial relationships. Geometry was one of the two fields of pre-modern mathematics, the other being the study of numbers ....

, a polyyotton (or 9-polytope) is a polytope
Polytope
In elementary geometry, a polytope is a geometric object with flat sides, which exists in any general number of dimensions. A polygon is a polytope in two dimensions, a polyhedron in three dimensions, and so on in higher dimensions...

 contained by 8-polytope facets. Each 7-polytope
7-polytope
In seven-dimensional geometry, a 7-polytope is a polytope contained by 6-polytope facets. Each 5-polytope ridge being shared by exactly two 6-polytope facets....

 ridge
Ridge (geometry)
In geometry, a ridge is an -dimensional element of an n-dimensional polytope. It is also sometimes called a subfacet for having one lower dimension than a facet.By dimension, this corresponds to:*a vertex of a polygon;...

 being shared by exactly two 8-polytope
8-polytope
In eight-dimensional geometry, a polyzetton is a polytope contained by 7-polytope facets. Each 6-polytope ridge being shared by exactly two 7-polytope facets....

 facets
Facet (mathematics)
A facet of a simplicial complex is a maximal simplex.In the general theory of polyhedra and polytopes, two conflicting meanings are currently jostling for acceptability:...

.

A uniform polyyotton is one which is vertex-transitive
Vertex-transitive
In geometry, a polytope is isogonal or vertex-transitive if, loosely speaking, all its vertices are the same...

, and constructed from uniform facets.

A proposed name for 9-polytope is polyyotton (plural: polyyotta), created from poly-, yotta-
Yotta
Yotta is the largest unit prefix in the International System of Units denoting a factor of 1024 or . It has the unit symbol Y.The prefix name is derived from the Greek , meaning eight, because it is equal to 10008...

(a variation on octa
Numerical prefix
Number prefixes are prefixes derived from numbers or numerals. In English and other European languages, they are used to coin numerous series of words, such as unicycle – bicycle – tricycle, dyad – triad – decade, biped – quadruped, September – October – November – December, decimal – hexadecimal,...

, meaning eight) and -on.

Regular 9-polytopes

Regular 9-polytopes can be represented by the Schläfli symbol {p,q,r,s,t,u,v,w}, with w {p,q,r,s,t,u,v} 8-polytope facets
Facet (mathematics)
A facet of a simplicial complex is a maximal simplex.In the general theory of polyhedra and polytopes, two conflicting meanings are currently jostling for acceptability:...

 around each peak
Peak (geometry)
In geometry, a peak is an -face of an n-dimensional polytope. A peak attaches at least three facets ....

.

There are exactly three such convex regular 9-polytopes:
  1. {3,3,3,3,3,3,3,3} - 9-simplex
  2. {4,3,3,3,3,3,3,3} - 9-cube
  3. {3,3,3,3,3,3,3,4} - 9-orthoplex


There are no nonconvex regular 9-polytopes.

Euler characteristic

The Euler characteristic
Euler characteristic
In mathematics, and more specifically in algebraic topology and polyhedral combinatorics, the Euler characteristic is a topological invariant, a number that describes a topological space's shape or structure regardless of the way it is bent...

 for 9-polytopes that are topological 8-spheres (including all convex 9-polytopes) is zero. χ=V-E+F-C+f4-f5+f6-f7+f8=2.

Uniform 9-polytopes by fundamental Coxeter groups

Uniform 9-polytopes with reflective symmetry can be generated by these three Coxeter groups, represented by permutations of rings of the Coxeter-Dynkin diagram
Coxeter-Dynkin diagram
In geometry, a Coxeter–Dynkin diagram is a graph with numerically labeled edges representing the spatial relations between a collection of mirrors...

s:
Coxeter group
Coxeter group
In mathematics, a Coxeter group, named after H.S.M. Coxeter, is an abstract group that admits a formal description in terms of mirror symmetries. Indeed, the finite Coxeter groups are precisely the finite Euclidean reflection groups; the symmetry groups of regular polyhedra are an example...

Coxeter-Dynkin diagram
Coxeter-Dynkin diagram
In geometry, a Coxeter–Dynkin diagram is a graph with numerically labeled edges representing the spatial relations between a collection of mirrors...

A9 [38]
B9 [4,37]
D9 [36,1,1]


Selected regular and uniform 9-polytopes from each family include:
  • Simplex
    Simplex
    In geometry, a simplex is a generalization of the notion of a triangle or tetrahedron to arbitrary dimension. Specifically, an n-simplex is an n-dimensional polytope which is the convex hull of its n + 1 vertices. For example, a 2-simplex is a triangle, a 3-simplex is a tetrahedron,...

     family: A9 [38] -
    • 271 uniform 9-polytopes as permutations of rings in the group diagram, including one regular:
      1. {38} - 9-simplex or deca-9-tope or decayotton -
  • Hypercube
    Hypercube
    In geometry, a hypercube is an n-dimensional analogue of a square and a cube . It is a closed, compact, convex figure whose 1-skeleton consists of groups of opposite parallel line segments aligned in each of the space's dimensions, perpendicular to each other and of the same length.An...

    /orthoplex family: B9 [4,38] -
    • 511 uniform 9-polytopes as permutations of rings in the group diagram, including two regular ones:
      1. {4,37} - 9-cube or enneract -
      2. {37,4} - 9-orthoplex or enneacross -
  • Demihypercube D9 family: [36,1,1] -
    • 383 uniform 9-polytope as permutations of rings in the group diagram, including:
      1. {31,6,1} - 9-demicube or demienneract, 16,1 - ; also as h{4,38} .
      2. {36,1,1} - 9-orthoplex, 61,1 -

The A9 family

The A9 family has symmetry of order 3628800 (10 factorial).

There are 256+16-1=271 forms based on all permutations of the Coxeter-Dynkin diagram
Coxeter-Dynkin diagram
In geometry, a Coxeter–Dynkin diagram is a graph with numerically labeled edges representing the spatial relations between a collection of mirrors...

s with one or more rings. These are all enumerated below. Bowers-style acronym names are given in parentheses for cross-referencing.
# Graph Coxeter-Dynkin diagram
Coxeter-Dynkin diagram
In geometry, a Coxeter–Dynkin diagram is a graph with numerically labeled edges representing the spatial relations between a collection of mirrors...


Schläfli symbol
Name
Element counts
8-faces 7-faces 6-faces 5-faces 4-faces Cells Faces Edges Vertices
1

t0{3,3,3,3,3,3,3,3}
9-simplex (day)
10 45 120 210 252 210 120 45 10
2

t1{3,3,3,3,3,3,3,3}
Rectified 9-simplex
Rectified 9-simplex
In nine-dimensional geometry, a rectified 9-simplex is a convex uniform 9-polytope, being a rectification of the regular 9-simplex.These polytopes are part of a family of 271 uniform 9-polytopes with A9 symmetry....

 (reday)
360 45
3

t2{3,3,3,3,3,3,3,3}
Birectified 9-simplex (breday)
1260 120
4

t3{3,3,3,3,3,3,3,3}
Trirectified 9-simplex (treday)
2520 210
5

t4{3,3,3,3,3,3,3,3}
Quadrirectified 9-simplex (icoy)
3150 252
6

t0,1{3,3,3,3,3,3,3,3}
Truncated 9-simplex (teday)
405 90
7

t0,2{3,3,3,3,3,3,3,3}
Cantellated 9-simplex
2880 360
8

t1,2{3,3,3,3,3,3,3,3}
Bitruncated 9-simplex
1620 360
9

t0,3{3,3,3,3,3,3,3,3}
Runcinated 9-simplex
8820 840
10

t1,3{3,3,3,3,3,3,3,3}
Bicantellated 9-simplex
10080 1260
11

t2,3{3,3,3,3,3,3,3,3}
Tritruncated 9-simplex (treday)
3780 840
12

t0,4{3,3,3,3,3,3,3,3}
Stericated 9-simplex
15120 1260
13

t1,4{3,3,3,3,3,3,3,3}
Biruncinated 9-simplex
26460 2520
14

t2,4{3,3,3,3,3,3,3,3}
Tricantellated 9-simplex
20160 2520
15

t3,4{3,3,3,3,3,3,3,3}
Quadritruncated 9-simplex
5670 1260
16

t0,5{3,3,3,3,3,3,3,3}
Pentellated 9-simplex
15750 1260
17

t1,5{3,3,3,3,3,3,3,3}
Bistericated 9-simplex
37800 3150
18

t2,5{3,3,3,3,3,3,3,3}
Triruncinated 9-simplex
44100 4200
19

t3,5{3,3,3,3,3,3,3,3}
Quadricantellated 9-simplex
25200 3150
20

t0,6{3,3,3,3,3,3,3,3}
Hexicated 9-simplex
10080 840
21

t1,6{3,3,3,3,3,3,3,3}
Bipentellated 9-simplex
31500 2520
22

t2,6{3,3,3,3,3,3,3,3}
Tristericated 9-simplex
50400 4200
23

t0,7{3,3,3,3,3,3,3,3}
Heptellated 9-simplex
3780 360
24

t1,7{3,3,3,3,3,3,3,3}
Bihexicated 9-simplex
15120 1260
25

t0,8{3,3,3,3,3,3,3,3}
Octellated 9-simplex
720 90
26

t0,1,2{3,3,3,3,3,3,3,3}
Cantitruncated 9-simplex
3240 720
27

t0,1,3{3,3,3,3,3,3,3,3}
Runcitruncated 9-simplex
18900 2520
28

t0,2,3{3,3,3,3,3,3,3,3}
Runcicantellated 9-simplex
12600 2520
29

t1,2,3{3,3,3,3,3,3,3,3}
Bicantitruncated 9-simplex
11340 2520
30

t0,1,4{3,3,3,3,3,3,3,3}
Steritruncated 9-simplex
47880 5040
31

t0,2,4{3,3,3,3,3,3,3,3}
Stericantellated 9-simplex
60480 7560
32

t1,2,4{3,3,3,3,3,3,3,3}
Biruncitruncated 9-simplex
52920 7560
33

t0,3,4{3,3,3,3,3,3,3,3}
Steriruncinated 9-simplex
27720 5040
34

t1,3,4{3,3,3,3,3,3,3,3}
Biruncicantellated 9-simplex
41580 7560
35

t2,3,4{3,3,3,3,3,3,3,3}
Tricantitruncated 9-simplex
22680 5040
36

t0,1,5{3,3,3,3,3,3,3,3}
Pentitruncated 9-simplex
66150 6300
37

t0,2,5{3,3,3,3,3,3,3,3}
Penticantellated 9-simplex
126000 12600
38

t1,2,5{3,3,3,3,3,3,3,3}
Bisteritruncated 9-simplex
107100 12600
39

t0,3,5{3,3,3,3,3,3,3,3}
Pentiruncinated 9-simplex
107100 12600
40

t1,3,5{3,3,3,3,3,3,3,3}
Bistericantellated 9-simplex
151200 18900
41

t2,3,5{3,3,3,3,3,3,3,3}
Triruncitruncated 9-simplex
81900 12600
42

t0,4,5{3,3,3,3,3,3,3,3}
Pentistericated 9-simplex
37800 6300
43

t1,4,5{3,3,3,3,3,3,3,3}
Bisteriruncinated 9-simplex
81900 12600
44

t2,4,5{3,3,3,3,3,3,3,3}
Triruncicantellated 9-simplex
75600 12600
45

t3,4,5{3,3,3,3,3,3,3,3}
Quadricantitruncated 9-simplex
28350 6300
46

t0,1,6{3,3,3,3,3,3,3,3}
Hexitruncated 9-simplex
52920 5040
47

t0,2,6{3,3,3,3,3,3,3,3}
Hexicantellated 9-simplex
138600 12600
48

t1,2,6{3,3,3,3,3,3,3,3}
Bipentitruncated 9-simplex
113400 12600
49

t0,3,6{3,3,3,3,3,3,3,3}
Hexiruncinated 9-simplex
176400 16800
50

t1,3,6{3,3,3,3,3,3,3,3}
Bipenticantellated 9-simplex
239400 25200
51

t2,3,6{3,3,3,3,3,3,3,3}
Tristeritruncated 9-simplex
126000 16800
52

t0,4,6{3,3,3,3,3,3,3,3}
Hexistericated 9-simplex
113400 12600
53

t1,4,6{3,3,3,3,3,3,3,3}
Bipentiruncinated 9-simplex
226800 25200
54

t2,4,6{3,3,3,3,3,3,3,3}
Tristericantellated 9-simplex
201600 25200
55

t0,5,6{3,3,3,3,3,3,3,3}
Hexipentellated 9-simplex
32760 5040
56

t1,5,6{3,3,3,3,3,3,3,3}
Bipentistericated 9-simplex
94500 12600
57

t0,1,7{3,3,3,3,3,3,3,3}
Heptitruncated 9-simplex
23940 2520
58

t0,2,7{3,3,3,3,3,3,3,3}
Hepticantellated 9-simplex
83160 7560
59

t1,2,7{3,3,3,3,3,3,3,3}
Bihexitruncated 9-simplex
64260 7560
60

t0,3,7{3,3,3,3,3,3,3,3}
Heptiruncinated 9-simplex
144900 12600
61

t1,3,7{3,3,3,3,3,3,3,3}
Bihexicantellated 9-simplex
189000 18900
62

t0,4,7{3,3,3,3,3,3,3,3}
Heptistericated 9-simplex
138600 12600
63

t1,4,7{3,3,3,3,3,3,3,3}
Bihexiruncinated 9-simplex
264600 25200
64

t0,5,7{3,3,3,3,3,3,3,3}
Heptipentellated 9-simplex
71820 7560
65

t0,6,7{3,3,3,3,3,3,3,3}
Heptihexicated 9-simplex
17640 2520
66

t0,1,8{3,3,3,3,3,3,3,3}
Octitruncated 9-simplex
5400 720
67

t0,2,8{3,3,3,3,3,3,3,3}
Octicantellated 9-simplex
25200 2520
68

t0,3,8{3,3,3,3,3,3,3,3}
Octiruncinated 9-simplex
57960 5040
69

t0,4,8{3,3,3,3,3,3,3,3}
Octistericated 9-simplex
75600 6300
70

t0,1,2,3{3,3,3,3,3,3,3,3}
Runcicantitruncated 9-simplex
22680 5040
71

t0,1,2,4{3,3,3,3,3,3,3,3}
Stericantitruncated 9-simplex
105840 15120
72

t0,1,3,4{3,3,3,3,3,3,3,3}
Steriruncitruncated 9-simplex
75600 15120
73

t0,2,3,4{3,3,3,3,3,3,3,3}
Steriruncicantellated 9-simplex
75600 15120
74

t1,2,3,4{3,3,3,3,3,3,3,3}
Biruncicantitruncated 9-simplex
68040 15120
75

t0,1,2,5{3,3,3,3,3,3,3,3}
Penticantitruncated 9-simplex
214200 25200
76

t0,1,3,5{3,3,3,3,3,3,3,3}
Pentiruncitruncated 9-simplex
283500 37800
77

t0,2,3,5{3,3,3,3,3,3,3,3}
Pentiruncicantellated 9-simplex
264600 37800
78

t1,2,3,5{3,3,3,3,3,3,3,3}
Bistericantitruncated 9-simplex
245700 37800
79

t0,1,4,5{3,3,3,3,3,3,3,3}
Pentisteritruncated 9-simplex
138600 25200
80

t0,2,4,5{3,3,3,3,3,3,3,3}
Pentistericantellated 9-simplex
226800 37800
81

t1,2,4,5{3,3,3,3,3,3,3,3}
Bisteriruncitruncated 9-simplex
189000 37800
82

t0,3,4,5{3,3,3,3,3,3,3,3}
Pentisteriruncinated 9-simplex
138600 25200
83

t1,3,4,5{3,3,3,3,3,3,3,3}
Bisteriruncicantellated 9-simplex
207900 37800
84

t2,3,4,5{3,3,3,3,3,3,3,3}
Triruncicantitruncated 9-simplex
113400 25200
85

t0,1,2,6{3,3,3,3,3,3,3,3}
Hexicantitruncated 9-simplex
226800 25200
86

t0,1,3,6{3,3,3,3,3,3,3,3}
Hexiruncitruncated 9-simplex
453600 50400
87

t0,2,3,6{3,3,3,3,3,3,3,3}
Hexiruncicantellated 9-simplex
403200 50400
88

t1,2,3,6{3,3,3,3,3,3,3,3}
Bipenticantitruncated 9-simplex
378000 50400
89

t0,1,4,6{3,3,3,3,3,3,3,3}
Hexisteritruncated 9-simplex
403200 50400
90

t0,2,4,6{3,3,3,3,3,3,3,3}
Hexistericantellated 9-simplex
604800 75600
91

t1,2,4,6{3,3,3,3,3,3,3,3}
Bipentiruncitruncated 9-simplex
529200 75600
92

t0,3,4,6{3,3,3,3,3,3,3,3}
Hexisteriruncinated 9-simplex
352800 50400
93

t1,3,4,6{3,3,3,3,3,3,3,3}
Bipentiruncicantellated 9-simplex
529200 75600
94

t2,3,4,6{3,3,3,3,3,3,3,3}
Tristericantitruncated 9-simplex
302400 50400
95

t0,1,5,6{3,3,3,3,3,3,3,3}
Hexipentitruncated 9-simplex
151200 25200
96

t0,2,5,6{3,3,3,3,3,3,3,3}
Hexipenticantellated 9-simplex
352800 50400
97

t1,2,5,6{3,3,3,3,3,3,3,3}
Bipentisteritruncated 9-simplex
277200 50400
98

t0,3,5,6{3,3,3,3,3,3,3,3}
Hexipentiruncinated 9-simplex
352800 50400
99

t1,3,5,6{3,3,3,3,3,3,3,3}
Bipentistericantellated 9-simplex
491400 75600
100

t2,3,5,6{3,3,3,3,3,3,3,3}
Tristeriruncitruncated 9-simplex
252000 50400
101

t0,4,5,6{3,3,3,3,3,3,3,3}
Hexipentistericated 9-simplex
151200 25200
102

t1,4,5,6{3,3,3,3,3,3,3,3}
Bipentisteriruncinated 9-simplex
327600 50400
103

t0,1,2,7{3,3,3,3,3,3,3,3}
Hepticantitruncated 9-simplex
128520 15120
104

t0,1,3,7{3,3,3,3,3,3,3,3}
Heptiruncitruncated 9-simplex
359100 37800
105

t0,2,3,7{3,3,3,3,3,3,3,3}
Heptiruncicantellated 9-simplex
302400 37800
106

t1,2,3,7{3,3,3,3,3,3,3,3}
Bihexicantitruncated 9-simplex
283500 37800
107

t0,1,4,7{3,3,3,3,3,3,3,3}
Heptisteritruncated 9-simplex
478800 50400
108

t0,2,4,7{3,3,3,3,3,3,3,3}
Heptistericantellated 9-simplex
680400 75600
109

t1,2,4,7{3,3,3,3,3,3,3,3}
Bihexiruncitruncated 9-simplex
604800 75600
110

t0,3,4,7{3,3,3,3,3,3,3,3}
Heptisteriruncinated 9-simplex
378000 50400
111

t1,3,4,7{3,3,3,3,3,3,3,3}
Bihexiruncicantellated 9-simplex
567000 75600
112

t0,1,5,7{3,3,3,3,3,3,3,3}
Heptipentitruncated 9-simplex
321300 37800
113

t0,2,5,7{3,3,3,3,3,3,3,3}
Heptipenticantellated 9-simplex
680400 75600
114

t1,2,5,7{3,3,3,3,3,3,3,3}
Bihexisteritruncated 9-simplex
567000 75600
115

t0,3,5,7{3,3,3,3,3,3,3,3}
Heptipentiruncinated 9-simplex
642600 75600
116

t1,3,5,7{3,3,3,3,3,3,3,3}
Bihexistericantellated 9-simplex
907200 113400
117

t0,4,5,7{3,3,3,3,3,3,3,3}
Heptipentistericated 9-simplex
264600 37800
118

t0,1,6,7{3,3,3,3,3,3,3,3}
Heptihexitruncated 9-simplex
98280 15120
119

t0,2,6,7{3,3,3,3,3,3,3,3}
Heptihexicantellated 9-simplex
302400 37800
120

t1,2,6,7{3,3,3,3,3,3,3,3}
Bihexipentitruncated 9-simplex
226800 37800
121

t0,3,6,7{3,3,3,3,3,3,3,3}
Heptihexiruncinated 9-simplex
428400 50400
122

t0,4,6,7{3,3,3,3,3,3,3,3}
Heptihexistericated 9-simplex
302400 37800
123

t0,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipentellated 9-simplex
98280 15120
124

t0,1,2,8{3,3,3,3,3,3,3,3}
Octicantitruncated 9-simplex
35280 5040
125

t0,1,3,8{3,3,3,3,3,3,3,3}
Octiruncitruncated 9-simplex
136080 15120
126

t0,2,3,8{3,3,3,3,3,3,3,3}
Octiruncicantellated 9-simplex
105840 15120
127

t0,1,4,8{3,3,3,3,3,3,3,3}
Octisteritruncated 9-simplex
252000 25200
128

t0,2,4,8{3,3,3,3,3,3,3,3}
Octistericantellated 9-simplex
340200 37800
129

t0,3,4,8{3,3,3,3,3,3,3,3}
Octisteriruncinated 9-simplex
176400 25200
130

t0,1,5,8{3,3,3,3,3,3,3,3}
Octipentitruncated 9-simplex
252000 25200
131

t0,2,5,8{3,3,3,3,3,3,3,3}
Octipenticantellated 9-simplex
504000 50400
132

t0,3,5,8{3,3,3,3,3,3,3,3}
Octipentiruncinated 9-simplex
453600 50400
133

t0,1,6,8{3,3,3,3,3,3,3,3}
Octihexitruncated 9-simplex
136080 15120
134

t0,2,6,8{3,3,3,3,3,3,3,3}
Octihexicantellated 9-simplex
378000 37800
135

t0,1,7,8{3,3,3,3,3,3,3,3}
Octiheptitruncated 9-simplex
35280 5040
136

t0,1,2,3,4{3,3,3,3,3,3,3,3}
Steriruncicantitruncated 9-simplex
136080 30240
137

t0,1,2,3,5{3,3,3,3,3,3,3,3}
Pentiruncicantitruncated 9-simplex
491400 75600
138

t0,1,2,4,5{3,3,3,3,3,3,3,3}
Pentistericantitruncated 9-simplex
378000 75600
139

t0,1,3,4,5{3,3,3,3,3,3,3,3}
Pentisteriruncitruncated 9-simplex
378000 75600
140

t0,2,3,4,5{3,3,3,3,3,3,3,3}
Pentisteriruncicantellated 9-simplex
378000 75600
141

t1,2,3,4,5{3,3,3,3,3,3,3,3}
Bisteriruncicantitruncated 9-simplex
340200 75600
142

t0,1,2,3,6{3,3,3,3,3,3,3,3}
Hexiruncicantitruncated 9-simplex
756000 100800
143

t0,1,2,4,6{3,3,3,3,3,3,3,3}
Hexistericantitruncated 9-simplex
1058400 151200
144

t0,1,3,4,6{3,3,3,3,3,3,3,3}
Hexisteriruncitruncated 9-simplex
982800 151200
145

t0,2,3,4,6{3,3,3,3,3,3,3,3}
Hexisteriruncicantellated 9-simplex
982800 151200
146

t1,2,3,4,6{3,3,3,3,3,3,3,3}
Bipentiruncicantitruncated 9-simplex
907200 151200
147

t0,1,2,5,6{3,3,3,3,3,3,3,3}
Hexipenticantitruncated 9-simplex
554400 100800
148

t0,1,3,5,6{3,3,3,3,3,3,3,3}
Hexipentiruncitruncated 9-simplex
907200 151200
149

t0,2,3,5,6{3,3,3,3,3,3,3,3}
Hexipentiruncicantellated 9-simplex
831600 151200
150

t1,2,3,5,6{3,3,3,3,3,3,3,3}
Bipentistericantitruncated 9-simplex
756000 151200
151

t0,1,4,5,6{3,3,3,3,3,3,3,3}
Hexipentisteritruncated 9-simplex
554400 100800
152

t0,2,4,5,6{3,3,3,3,3,3,3,3}
Hexipentistericantellated 9-simplex
907200 151200
153

t1,2,4,5,6{3,3,3,3,3,3,3,3}
Bipentisteriruncitruncated 9-simplex
756000 151200
154

t0,3,4,5,6{3,3,3,3,3,3,3,3}
Hexipentisteriruncinated 9-simplex
554400 100800
155

t1,3,4,5,6{3,3,3,3,3,3,3,3}
Bipentisteriruncicantellated 9-simplex
831600 151200
156

t2,3,4,5,6{3,3,3,3,3,3,3,3}
Tristeriruncicantitruncated 9-simplex
453600 100800
157

t0,1,2,3,7{3,3,3,3,3,3,3,3}
Heptiruncicantitruncated 9-simplex
567000 75600
158

t0,1,2,4,7{3,3,3,3,3,3,3,3}
Heptistericantitruncated 9-simplex
1209600 151200
159

t0,1,3,4,7{3,3,3,3,3,3,3,3}
Heptisteriruncitruncated 9-simplex
1058400 151200
160

t0,2,3,4,7{3,3,3,3,3,3,3,3}
Heptisteriruncicantellated 9-simplex
1058400 151200
161

t1,2,3,4,7{3,3,3,3,3,3,3,3}
Bihexiruncicantitruncated 9-simplex
982800 151200
162

t0,1,2,5,7{3,3,3,3,3,3,3,3}
Heptipenticantitruncated 9-simplex
1134000 151200
163

t0,1,3,5,7{3,3,3,3,3,3,3,3}
Heptipentiruncitruncated 9-simplex
1701000 226800
164

t0,2,3,5,7{3,3,3,3,3,3,3,3}
Heptipentiruncicantellated 9-simplex
1587600 226800
165

t1,2,3,5,7{3,3,3,3,3,3,3,3}
Bihexistericantitruncated 9-simplex
1474200 226800
166

t0,1,4,5,7{3,3,3,3,3,3,3,3}
Heptipentisteritruncated 9-simplex
982800 151200
167

t0,2,4,5,7{3,3,3,3,3,3,3,3}
Heptipentistericantellated 9-simplex
1587600 226800
168

t1,2,4,5,7{3,3,3,3,3,3,3,3}
Bihexisteriruncitruncated 9-simplex
1360800 226800
169

t0,3,4,5,7{3,3,3,3,3,3,3,3}
Heptipentisteriruncinated 9-simplex
982800 151200
170

t1,3,4,5,7{3,3,3,3,3,3,3,3}
Bihexisteriruncicantellated 9-simplex
1474200 226800
171

t0,1,2,6,7{3,3,3,3,3,3,3,3}
Heptihexicantitruncated 9-simplex
453600 75600
172

t0,1,3,6,7{3,3,3,3,3,3,3,3}
Heptihexiruncitruncated 9-simplex
1058400 151200
173

t0,2,3,6,7{3,3,3,3,3,3,3,3}
Heptihexiruncicantellated 9-simplex
907200 151200
174

t1,2,3,6,7{3,3,3,3,3,3,3,3}
Bihexipenticantitruncated 9-simplex
831600 151200
175

t0,1,4,6,7{3,3,3,3,3,3,3,3}
Heptihexisteritruncated 9-simplex
1058400 151200
176

t0,2,4,6,7{3,3,3,3,3,3,3,3}
Heptihexistericantellated 9-simplex
1587600 226800
177

t1,2,4,6,7{3,3,3,3,3,3,3,3}
Bihexipentiruncitruncated 9-simplex
1360800 226800
178

t0,3,4,6,7{3,3,3,3,3,3,3,3}
Heptihexisteriruncinated 9-simplex
907200 151200
179

t0,1,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipentitruncated 9-simplex
453600 75600
180

t0,2,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipenticantellated 9-simplex
1058400 151200
181

t0,3,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipentiruncinated 9-simplex
1058400 151200
182

t0,4,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipentistericated 9-simplex
453600 75600
183

t0,1,2,3,8{3,3,3,3,3,3,3,3}
Octiruncicantitruncated 9-simplex
196560 30240
184

t0,1,2,4,8{3,3,3,3,3,3,3,3}
Octistericantitruncated 9-simplex
604800 75600
185

t0,1,3,4,8{3,3,3,3,3,3,3,3}
Octisteriruncitruncated 9-simplex
491400 75600
186

t0,2,3,4,8{3,3,3,3,3,3,3,3}
Octisteriruncicantellated 9-simplex
491400 75600
187

t0,1,2,5,8{3,3,3,3,3,3,3,3}
Octipenticantitruncated 9-simplex
856800 100800
188

t0,1,3,5,8{3,3,3,3,3,3,3,3}
Octipentiruncitruncated 9-simplex
1209600 151200
189

t0,2,3,5,8{3,3,3,3,3,3,3,3}
Octipentiruncicantellated 9-simplex
1134000 151200
190

t0,1,4,5,8{3,3,3,3,3,3,3,3}
Octipentisteritruncated 9-simplex
655200 100800
191

t0,2,4,5,8{3,3,3,3,3,3,3,3}
Octipentistericantellated 9-simplex
1058400 151200
192

t0,3,4,5,8{3,3,3,3,3,3,3,3}
Octipentisteriruncinated 9-simplex
655200 100800
193

t0,1,2,6,8{3,3,3,3,3,3,3,3}
Octihexicantitruncated 9-simplex
604800 75600
194

t0,1,3,6,8{3,3,3,3,3,3,3,3}
Octihexiruncitruncated 9-simplex
1285200 151200
195

t0,2,3,6,8{3,3,3,3,3,3,3,3}
Octihexiruncicantellated 9-simplex
1134000 151200
196

t0,1,4,6,8{3,3,3,3,3,3,3,3}
Octihexisteritruncated 9-simplex
1209600 151200
197

t0,2,4,6,8{3,3,3,3,3,3,3,3}
Octihexistericantellated 9-simplex
1814400 226800
198

t0,1,5,6,8{3,3,3,3,3,3,3,3}
Octihexipentitruncated 9-simplex
491400 75600
199

t0,1,2,7,8{3,3,3,3,3,3,3,3}
Octihepticantitruncated 9-simplex
196560 30240
200

t0,1,3,7,8{3,3,3,3,3,3,3,3}
Octiheptiruncitruncated 9-simplex
604800 75600
201

t0,1,4,7,8{3,3,3,3,3,3,3,3}
Octiheptisteritruncated 9-simplex
856800 100800
202

t0,1,2,3,4,5{3,3,3,3,3,3,3,3}
Pentisteriruncicantitruncated 9-simplex
680400 151200
203

t0,1,2,3,4,6{3,3,3,3,3,3,3,3}
Hexisteriruncicantitruncated 9-simplex
1814400 302400
204

t0,1,2,3,5,6{3,3,3,3,3,3,3,3}
Hexipentiruncicantitruncated 9-simplex
1512000 302400
205

t0,1,2,4,5,6{3,3,3,3,3,3,3,3}
Hexipentistericantitruncated 9-simplex
1512000 302400
206

t0,1,3,4,5,6{3,3,3,3,3,3,3,3}
Hexipentisteriruncitruncated 9-simplex
1512000 302400
207

t0,2,3,4,5,6{3,3,3,3,3,3,3,3}
Hexipentisteriruncicantellated 9-simplex
1512000 302400
208

t1,2,3,4,5,6{3,3,3,3,3,3,3,3}
Bipentisteriruncicantitruncated 9-simplex
1360800 302400
209

t0,1,2,3,4,7{3,3,3,3,3,3,3,3}
Heptisteriruncicantitruncated 9-simplex
1965600 302400
210

t0,1,2,3,5,7{3,3,3,3,3,3,3,3}
Heptipentiruncicantitruncated 9-simplex
2948400 453600
211

t0,1,2,4,5,7{3,3,3,3,3,3,3,3}
Heptipentistericantitruncated 9-simplex
2721600 453600
212

t0,1,3,4,5,7{3,3,3,3,3,3,3,3}
Heptipentisteriruncitruncated 9-simplex
2721600 453600
213

t0,2,3,4,5,7{3,3,3,3,3,3,3,3}
Heptipentisteriruncicantellated 9-simplex
2721600 453600
214

t1,2,3,4,5,7{3,3,3,3,3,3,3,3}
Bihexisteriruncicantitruncated 9-simplex
2494800 453600
215

t0,1,2,3,6,7{3,3,3,3,3,3,3,3}
Heptihexiruncicantitruncated 9-simplex
1663200 302400
216

t0,1,2,4,6,7{3,3,3,3,3,3,3,3}
Heptihexistericantitruncated 9-simplex
2721600 453600
217

t0,1,3,4,6,7{3,3,3,3,3,3,3,3}
Heptihexisteriruncitruncated 9-simplex
2494800 453600
218

t0,2,3,4,6,7{3,3,3,3,3,3,3,3}
Heptihexisteriruncicantellated 9-simplex
2494800 453600
219

t1,2,3,4,6,7{3,3,3,3,3,3,3,3}
Bihexipentiruncicantitruncated 9-simplex
2268000 453600
220

t0,1,2,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipenticantitruncated 9-simplex
1663200 302400
221

t0,1,3,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipentiruncitruncated 9-simplex
2721600 453600
222

t0,2,3,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipentiruncicantellated 9-simplex
2494800 453600
223

t1,2,3,5,6,7{3,3,3,3,3,3,3,3}
Bihexipentistericantitruncated 9-simplex
2268000 453600
224

t0,1,4,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipentisteritruncated 9-simplex
1663200 302400
225

t0,2,4,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipentistericantellated 9-simplex
2721600 453600
226

t0,3,4,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipentisteriruncinated 9-simplex
1663200 302400
227

t0,1,2,3,4,8{3,3,3,3,3,3,3,3}
Octisteriruncicantitruncated 9-simplex
907200 151200
228

t0,1,2,3,5,8{3,3,3,3,3,3,3,3}
Octipentiruncicantitruncated 9-simplex
2116800 302400
229

t0,1,2,4,5,8{3,3,3,3,3,3,3,3}
Octipentistericantitruncated 9-simplex
1814400 302400
230

t0,1,3,4,5,8{3,3,3,3,3,3,3,3}
Octipentisteriruncitruncated 9-simplex
1814400 302400
231

t0,2,3,4,5,8{3,3,3,3,3,3,3,3}
Octipentisteriruncicantellated 9-simplex
1814400 302400
232

t0,1,2,3,6,8{3,3,3,3,3,3,3,3}
Octihexiruncicantitruncated 9-simplex
2116800 302400
233

t0,1,2,4,6,8{3,3,3,3,3,3,3,3}
Octihexistericantitruncated 9-simplex
3175200 453600
234

t0,1,3,4,6,8{3,3,3,3,3,3,3,3}
Octihexisteriruncitruncated 9-simplex
2948400 453600
235

t0,2,3,4,6,8{3,3,3,3,3,3,3,3}
Octihexisteriruncicantellated 9-simplex
2948400 453600
236

t0,1,2,5,6,8{3,3,3,3,3,3,3,3}
Octihexipenticantitruncated 9-simplex
1814400 302400
237

t0,1,3,5,6,8{3,3,3,3,3,3,3,3}
Octihexipentiruncitruncated 9-simplex
2948400 453600
238

t0,2,3,5,6,8{3,3,3,3,3,3,3,3}
Octihexipentiruncicantellated 9-simplex
2721600 453600
239

t0,1,4,5,6,8{3,3,3,3,3,3,3,3}
Octihexipentisteritruncated 9-simplex
1814400 302400
240

t0,1,2,3,7,8{3,3,3,3,3,3,3,3}
Octiheptiruncicantitruncated 9-simplex
907200 151200
241

t0,1,2,4,7,8{3,3,3,3,3,3,3,3}
Octiheptistericantitruncated 9-simplex
2116800 302400
242

t0,1,3,4,7,8{3,3,3,3,3,3,3,3}
Octiheptisteriruncitruncated 9-simplex
1814400 302400
243

t0,1,2,5,7,8{3,3,3,3,3,3,3,3}
Octiheptipenticantitruncated 9-simplex
2116800 302400
244

t0,1,3,5,7,8{3,3,3,3,3,3,3,3}
Octiheptipentiruncitruncated 9-simplex
3175200 453600
245

t0,1,2,6,7,8{3,3,3,3,3,3,3,3}
Octiheptihexicantitruncated 9-simplex
907200 151200
246

t0,1,2,3,4,5,6{3,3,3,3,3,3,3,3}
Hexipentisteriruncicantitruncated 9-simplex
2721600 604800
247

t0,1,2,3,4,5,7{3,3,3,3,3,3,3,3}
Heptipentisteriruncicantitruncated 9-simplex
4989600 907200
248

t0,1,2,3,4,6,7{3,3,3,3,3,3,3,3}
Heptihexisteriruncicantitruncated 9-simplex
4536000 907200
249

t0,1,2,3,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipentiruncicantitruncated 9-simplex
4536000 907200
250

t0,1,2,4,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipentistericantitruncated 9-simplex
4536000 907200
251

t0,1,3,4,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipentisteriruncitruncated 9-simplex
4536000 907200
252

t0,2,3,4,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipentisteriruncicantellated 9-simplex
4536000 907200
253

t1,2,3,4,5,6,7{3,3,3,3,3,3,3,3}
Bihexipentisteriruncicantitruncated 9-simplex
4082400 907200
254

t0,1,2,3,4,5,8{3,3,3,3,3,3,3,3}
Octipentisteriruncicantitruncated 9-simplex
3326400 604800
255

t0,1,2,3,4,6,8{3,3,3,3,3,3,3,3}
Octihexisteriruncicantitruncated 9-simplex
5443200 907200
256

t0,1,2,3,5,6,8{3,3,3,3,3,3,3,3}
Octihexipentiruncicantitruncated 9-simplex
4989600 907200
257

t0,1,2,4,5,6,8{3,3,3,3,3,3,3,3}
Octihexipentistericantitruncated 9-simplex
4989600 907200
258

t0,1,3,4,5,6,8{3,3,3,3,3,3,3,3}
Octihexipentisteriruncitruncated 9-simplex
4989600 907200
259

t0,2,3,4,5,6,8{3,3,3,3,3,3,3,3}
Octihexipentisteriruncicantellated 9-simplex
4989600 907200
260

t0,1,2,3,4,7,8{3,3,3,3,3,3,3,3}
Octiheptisteriruncicantitruncated 9-simplex
3326400 604800
261

t0,1,2,3,5,7,8{3,3,3,3,3,3,3,3}
Octiheptipentiruncicantitruncated 9-simplex
5443200 907200
262

t0,1,2,4,5,7,8{3,3,3,3,3,3,3,3}
Octiheptipentistericantitruncated 9-simplex
4989600 907200
263

t0,1,3,4,5,7,8{3,3,3,3,3,3,3,3}
Octiheptipentisteriruncitruncated 9-simplex
4989600 907200
264

t0,1,2,3,6,7,8{3,3,3,3,3,3,3,3}
Octiheptihexiruncicantitruncated 9-simplex
3326400 604800
265

t0,1,2,4,6,7,8{3,3,3,3,3,3,3,3}
Octiheptihexistericantitruncated 9-simplex
5443200 907200
266

t0,1,2,3,4,5,6,7{3,3,3,3,3,3,3,3}
Heptihexipentisteriruncicantitruncated 9-simplex
8164800 1814400
267

t0,1,2,3,4,5,6,8{3,3,3,3,3,3,3,3}
Octihexipentisteriruncicantitruncated 9-simplex
9072000 1814400
268

t0,1,2,3,4,5,7,8{3,3,3,3,3,3,3,3}
Octiheptipentisteriruncicantitruncated 9-simplex
9072000 1814400
269

t0,1,2,3,4,6,7,8{3,3,3,3,3,3,3,3}
Octiheptihexisteriruncicantitruncated 9-simplex
9072000 1814400
270

t0,1,2,3,5,6,7,8{3,3,3,3,3,3,3,3}
Octiheptihexipentiruncicantitruncated 9-simplex
9072000 1814400
271

t0,1,2,3,4,5,6,7,8{3,3,3,3,3,3,3,3}
Omnitruncated 9-simplex
16329600 3628800

The B9 family

There are 511 forms based on all permutations of the Coxeter-Dynkin diagram
Coxeter-Dynkin diagram
In geometry, a Coxeter–Dynkin diagram is a graph with numerically labeled edges representing the spatial relations between a collection of mirrors...

s with one or more rings.

Eleven cases are shown below: Nine rectified
Rectification (geometry)
In Euclidean geometry, rectification is the process of truncating a polytope by marking the midpoints of all its edges, and cutting off its vertices at those points...

 forms and 2 truncations. Bowers-style acronym names are given in parentheses for cross-referencing. Bowers-style acronym names are given in parentheses for cross-referencing.
# Graph Coxeter-Dynkin diagram
Coxeter-Dynkin diagram
In geometry, a Coxeter–Dynkin diagram is a graph with numerically labeled edges representing the spatial relations between a collection of mirrors...


Schläfli symbol
Name
Element counts
8-faces 7-faces 6-faces 5-faces 4-faces Cells Faces Edges Vertices
1
t0{4,3,3,3,3,3,3,3}
9-cube (enne)
18 144 672 2016 4032 5376 4608 2304 512
2
t0,1{4,3,3,3,3,3,3,3}
Truncated 9-cube (ten)
2304 4608
3
t1{4,3,3,3,3,3,3,3}
Rectified 9-cube
Rectified 9-cube
In nine-dimensional geometry, a rectified 9-cube is a convex uniform 9-polytope, being a rectification of the regular 9-cube.There are 9 rectifications of the 9-cube. The zeroth is the 9-cube itself, and the 8th is the dual 9-orthoplex. Vertices of the rectified 9-cube are located at the...

 (ren)
18432 2304
4
t2{4,3,3,3,3,3,3,3}
Birectified 9-cube (barn)
64512 4608
5
t3{4,3,3,3,3,3,3,3}
Trirectified 9-cube (tarn)
96768 5376
6
t4{4,3,3,3,3,3,3,3}
Quadrirectified 9-cube (nav)
(Quadrirectified 9-orthoplex)
80640 4032
7
t3{3,3,3,3,3,3,3,4}
Trirectified 9-orthoplex (tarv)
40320 2016
8
t2{3,3,3,3,3,3,3,4}
Birectified 9-orthoplex (brav)
12096 672
9
t1{3,3,3,3,3,3,3,4}
Rectified 9-orthoplex
Rectified 9-orthoplex
In nine-dimensional geometry, a rectified 9-simplex is a convex uniform 9-polytope, being a rectification of the regular 9-orthoplex.There are 9 rectifications of the 9-orthoplex. Vertices of the rectified 9-orthoplex are located at the edge-centers of the 9-orthoplex. Vertices of the birectified...

 (riv)
2016 144
10
t0,1{3,3,3,3,3,3,3,4}
Truncated 9-orthoplex (tiv)
2160 288
11
t0{3,3,3,3,3,3,3,4}
9-orthoplex (vee)
512 2304 4608 5376 4032 2016 672 144 18

The D9 family

The D9 family has symmetry of order 92,897,280 (9 factorial
Factorial
In mathematics, the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n...

 × 28).

This family has 3×128−1=383 Wythoffian uniform polytopes, generated by marking one or more nodes of the D9 Coxeter-Dynkin diagram
Coxeter-Dynkin diagram
In geometry, a Coxeter–Dynkin diagram is a graph with numerically labeled edges representing the spatial relations between a collection of mirrors...

. Of these, 255 (2×128−1) are repeated from the B9 family and 128 are unique to this family, with the eight 1 or 2 ringed forms listed below. Bowers-style acronym names are given in parentheses for cross-referencing.
# Coxeter plane graphs Coxeter-Dynkin diagram
Coxeter-Dynkin diagram
In geometry, a Coxeter–Dynkin diagram is a graph with numerically labeled edges representing the spatial relations between a collection of mirrors...


Schläfli symbol
Base point
(Alternately signed)
Element counts Circumrad
B9 D9 D8 D7 D6 D5 D4 D3 A7 A5 A3 8 7 6 5 4 3 2 1 0
1
9-demicube (henne)
(1,1,1,1,1,1,1,1,1) 274 2448 9888 23520 36288 37632 21404 4608 256 1.0606601
2
Truncated 9-demicube (thenne)
(1,1,3,3,3,3,3,3,3) 69120 9216 2.8504384
3
Cantellated 9-demicube
(1,1,1,3,3,3,3,3,3) 225792 21504 2.6692696
4
Runcinated 9-demicube
(1,1,1,1,3,3,3,3,3) 419328 32256 2.4748735
5
Stericated 9-demicube
(1,1,1,1,1,3,3,3,3) 483840 32256 2.2638462
6
Pentellated 9-demicube
(1,1,1,1,1,1,3,3,3) 354816 21504 2.0310094
7
Hexicated 9-demicube
(1,1,1,1,1,1,1,3,3) 161280 9216 1.7677668
8
Heptellated 9-demicube
(1,1,1,1,1,1,1,1,3) 41472 2304 1.4577379

Regular and uniform honeycombs

There are five fundamental affine Coxeter groups that generate regular and uniform tessellations in 8-space:
# Coxeter group
Coxeter group
In mathematics, a Coxeter group, named after H.S.M. Coxeter, is an abstract group that admits a formal description in terms of mirror symmetries. Indeed, the finite Coxeter groups are precisely the finite Euclidean reflection groups; the symmetry groups of regular polyhedra are an example...

Coxeter-Dynkin diagram
Coxeter-Dynkin diagram
In geometry, a Coxeter–Dynkin diagram is a graph with numerically labeled edges representing the spatial relations between a collection of mirrors...

1 [3[8]]
2 h[4,36,4]
[4,35,31,1]
3 [4,36,4]
4 q[4,36,4]
[31,1,34,31,1]
5 [35,2,1]


Regular and uniform tessellations include:
  • :
    • Regular octeractic honeycomb: {4,36,4},
  • :
    • Uniform demiocteractic honeycomb: h{4,36,4} or {31,1,35,4}, or
  • :
    • Uniform 521 honeycomb:
    • Uniform 251 honeycomb
      Gosset 2 51 honeycomb
      In 8-dimensional geometry, the 251 honeycomb is a space-filling uniform tessellation. It is composed of 241 polytope and 8-simplex facets arranged in a demiocteract vertex figure...

      :
    • Uniform 152 honeycomb
      Gosset 1 52 honeycomb
      In geometry, the 152 honeycomb is a uniform tessellation of 8-dimensional Euclidean space. It contains 142 and 151 facets, in a birectified 8-simplex vertex figure...

      :

Regular and uniform hyperbolic honeycombs

There are no compact hyperbolic Coxeter groups of rank 9, groups that can generate honeycombs with all finite facets, and a finite vertex figure
Vertex figure
In geometry a vertex figure is, broadly speaking, the figure exposed when a corner of a polyhedron or polytope is sliced off.-Definitions - theme and variations:...

. However there are 4 noncompact hyperbolic Coxeter groups of rank 9, each generating uniform honeycombs in 8-space as permutations of rings of the Coxeter diagrams.
= [3,3[8]]:
= [31,1,33,32,1]:
= [4,34,32,1]:
= [34,3,1]:

External links

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