Uniform 7-polytope

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Graphs of three regular and related uniform polytopes

7-simplex

Rectified 7-simplex

Truncated 7-simplex

Cantellated 7-simplex

Runcinated 7-simplex

Stericated 7-simplex

Pentellated 7-simplex

Hexicated 7-simplex

7-orthoplex

Truncated 7-orthoplex

Rectified 7-orthoplex

Cantellated 7-orthoplex

Runcinated 7-orthoplex

Stericated 7-orthoplex

Pentellated 7-orthoplex

Hexicated 7-cube

Pentellated 7-cube

Stericated 7-cube

Cantellated 7-cube

Runcinated 7-cube

7-cube

Truncated 7-cube

Rectified 7-cube

7-demicube

Truncated 7-demicube

Cantellated 7-demicube

Runcinated 7-demicube

Stericated 7-demicube

Pentellated 7-demicube

321

231

132

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.

A uniform 7-polytope is one which is vertex-transitive, and constructed from uniform 6-polytope facets.

A proposed name for 7-polytopes is polyexon or polyecton.

Regular 7-polytopes

Regular 7-polytopes are represented by the Schläfli symbol {p,q,r,s,t,u} with u {p,q,r,s,t} 6-polytopes facets around each 4-face.

There are exactly three such convex regular 7-polytopes:

  1. {3,3,3,3,3,3} - 7-simplex
  2. {4,3,3,3,3,3} - 7-cube
  3. {3,3,3,3,3,4} - 7-orthoplex

There are no nonconvex regular 7-polytopes.

Euler characteristic

The Euler characteristic for 7-polytopes that are topological 6-spheres (including all convex 7-polytopes) is two. χ=V-E+F-C+f4-f5+f6=2.

Uniform 7-polytopes by fundamental Coxeter groups

Uniform 7-polytopes with reflective symmetry can be generated by these four Coxeter groups, represented by permutations of rings of the Coxeter-Dynkin diagrams:

# Coxeter group Coxeter-Dynkin
diagram
Regular and semiregular forms Uniform count
1A7 [36] 71
2B7[4,35] 127
3D7[34,1,1] 95 (32 unique)
4E7[33,2,1]
  • 321 -
  • 132 -
  • 231 -
127
Prismatic finite Coxeter groups
# Coxeter group Coxeter-Dynkin diagram
6+1
1 A6×A1 [35]×[ ]
2 BC6×A1 [4,34]×[ ]
3 D6×A1 [33,1,1]×[ ]
4 E6×A1 [32,2,1]×[ ]
5+2
1 A5×I2(p) [3,3,3]×[p]
2 BC5×I2(p) [4,3,3]×[p]
3 D5×I2(p) [32,1,1]×[p]
5+1+1
1 A5×A12 [3,3,3]×[ ]2
2 BC5×A12 [4,3,3]×[ ]2
3 D5×A12 [32,1,1]×[ ]2
4+3
4 A4×A3 [3,3,3]×[3,3]
5 A4×BC3 [3,3,3]×[4,3]
6 A4×H3 [3,3,3]×[5,3]
7 BC4×A3 [4,3,3]×[3,3]
8 BC4×BC3 [4,3,3]×[4,3]
9 BC4×H3 [4,3,3]×[5,3]
10 H4×A3 [5,3,3]×[3,3]
11 H4×BC3 [5,3,3]×[4,3]
12 H4×H3 [5,3,3]×[5,3]
13 F4×A3 [3,4,3]×[3,3]
14 F4×BC3 [3,4,3]×[4,3]
15 F4×H3 [3,4,3]×[5,3]
16 D4×A3 [31,1,1]×[3,3]
17 D4×BC3 [31,1,1]×[4,3]
18 D4×H3 [31,1,1]×[5,3]
4+2+1
5 A4×I2(p)×A1 [3,3,3]×[p]×[ ]
6 BC4×I2(p)×A1 [4,3,3]×[p]×[ ]
7 F4×I2(p)×A1 [3,4,3]×[p]×[ ]
8 H4×I2(p)×A1 [5,3,3]×[p]×[ ]
9 D4×I2(p)×A1 [31,1,1]×[p]×[ ]
4+1+1+1
5 A4×A13 [3,3,3]×[ ]3
6 BC4×A13 [4,3,3]×[ ]3
7 F4×A13 [3,4,3]×[ ]3
8 H4×A13 [5,3,3]×[ ]3
9 D4×A13 [31,1,1]×[ ]3
3+3+1
10 A3×A3×A1 [3,3]×[3,3]×[ ]
11 A3×BC3×A1 [3,3]×[4,3]×[ ]
12 A3×H3×A1 [3,3]×[5,3]×[ ]
13 BC3×BC3×A1 [4,3]×[4,3]×[ ]
14 BC3×H3×A1 [4,3]×[5,3]×[ ]
15 H3×A3×A1 [5,3]×[5,3]×[ ]
3+2+2
1 A3×I2(p)×I2(q) [3,3]×[p]×[q]
2 BC3×I2(p)×I2(q) [4,3]×[p]×[q]
3 H3×I2(p)×I2(q) [5,3]×[p]×[q]
3+2+1+1
1 A3×I2(p)×A12 [3,3]×[p]×[ ]2
2 BC3×I2(p)×A12 [4,3]×[p]×[ ]2
3 H3×I2(p)×A12 [5,3]×[p]×[ ]2
3+1+1+1+1
1 A3×A14 [3,3]×[ ]4
2 BC3×A14 [4,3]×[ ]4
3 H3×A14 [5,3]×[ ]4
2+2+2+1
1 I2(p)×I2(q)×I2(r)×A1 [p]×[q]×[r]×[ ]
2+2+1+1+1
1 I2(p)×I2(q)×A13 [p]×[q]×[ ]3
2+1+1+1+1+1
1 I2(p)×A15 [p]×[ ]5
1+1+1+1+1+1+1
1 A17 [ ]7

The A7 family

The A7 family has symmetry of order 40320 (8 factorial).

There are 71 (64+8-1) forms based on all permutations of the Coxeter-Dynkin diagrams with one or more rings. All 71 are enumerated below. Norman Johnson's truncation names are given. Bowers names and acronym are also given for cross-referencing.

See also a list of A7 polytopes for symmetric Coxeter plane graphs of these polytopes.

# Coxeter-Dynkin diagram Truncation
indices
Johnson name
Bowers name (and acronym)
Basepoint Element counts
6 5 4 3 2 1 0
1t07-simplex (oca)(0,0,0,0,0,0,0,1)828567056288
2t1Rectified 7-simplex (roc)(0,0,0,0,0,0,1,1)168422435033616828
3t2Birectified 7-simplex (broc)(0,0,0,0,0,1,1,1)1611239277084042056
4t3Trirectified 7-simplex (he)(0,0,0,0,1,1,1,1)16112448980112056070
5t0,1Truncated 7-simplex (toc)(0,0,0,0,0,0,1,2)168422435033619656
6t0,2Cantellated 7-simplex (saro)(0,0,0,0,0,1,1,2)44308980175018761008168
7t1,2Bitruncated 7-simplex (bittoc)(0,0,0,0,0,1,2,2)588168
8t0,3Runcinated 7-simplex (spo)(0,0,0,0,1,1,1,2)1007562548483047602100280
9t1,3Bicantellated 7-simplex (sabro)(0,0,0,0,1,1,2,2)2520420
10t2,3Tritruncated 7-simplex (tattoc)(0,0,0,0,1,2,2,2)980280
11t0,4Stericated 7-simplex (sco)(0,0,0,1,1,1,1,2)2240280
12t1,4Biruncinated 7-simplex (sibpo)(0,0,0,1,1,1,2,2)4200560
13t2,4Tricantellated 7-simplex (stiroh)(0,0,0,1,1,2,2,2)3360560
14t0,5Pentellated 7-simplex (seto)(0,0,1,1,1,1,1,2)1260168
15t1,5Bistericated 7-simplex (sabach)(0,0,1,1,1,1,2,2)3360420
16t0,6Hexicated 7-simplex (suph)(0,1,1,1,1,1,1,2)33656
17t0,1,2Cantitruncated 7-simplex (garo)(0,0,0,0,0,1,2,3)1176336
18t0,1,3Runcitruncated 7-simplex (patto)(0,0,0,0,1,1,2,3)4620840
19t0,2,3Runcicantellated 7-simplex (paro)(0,0,0,0,1,2,2,3)3360840
20t1,2,3Bicantitruncated 7-simplex (gabro)(0,0,0,0,1,2,3,3)2940840
21t0,1,4Steritruncated 7-simplex (cato)(0,0,0,1,1,1,2,3)72801120
22t0,2,4Stericantellated 7-simplex (caro)(0,0,0,1,1,2,2,3)100801680
23t1,2,4Biruncitruncated 7-simplex (bipto)(0,0,0,1,1,2,3,3)84001680
24t0,3,4Steriruncinated 7-simplex (cepo)(0,0,0,1,2,2,2,3)50401120
25t1,3,4Biruncicantellated 7-simplex (bipro)(0,0,0,1,2,2,3,3)75601680
26t2,3,4Tricantitruncated 7-simplex (gatroh)(0,0,0,1,2,3,3,3)39201120
27t0,1,5Pentitruncated 7-simplex (teto)(0,0,1,1,1,1,2,3)5460840
28t0,2,5Penticantellated 7-simplex (tero)(0,0,1,1,1,2,2,3)117601680
29t1,2,5Bisteritruncated 7-simplex (bacto)(0,0,1,1,1,2,3,3)92401680
30t0,3,5Pentiruncinated 7-simplex (tepo)(0,0,1,1,2,2,2,3)109201680
31t1,3,5Bistericantellated 7-simplex (bacroh)(0,0,1,1,2,2,3,3)151202520
32t0,4,5Pentistericated 7-simplex (teco)(0,0,1,2,2,2,2,3)4200840
33t0,1,6Hexitruncated 7-simplex (puto)(0,1,1,1,1,1,2,3)1848336
34t0,2,6Hexicantellated 7-simplex (puro)(0,1,1,1,1,2,2,3)5880840
35t0,3,6Hexiruncinated 7-simplex (puph)(0,1,1,1,2,2,2,3)84001120
36t0,1,2,3Runcicantitruncated 7-simplex (gapo)(0,0,0,0,1,2,3,4)58801680
37t0,1,2,4Stericantitruncated 7-simplex (cagro)(0,0,0,1,1,2,3,4)168003360
38t0,1,3,4Steriruncitruncated 7-simplex (capto)(0,0,0,1,2,2,3,4)134403360
39t0,2,3,4Steriruncicantellated 7-simplex (capro)(0,0,0,1,2,3,3,4)134403360
40t1,2,3,4Biruncicantitruncated 7-simplex (gibpo)(0,0,0,1,2,3,4,4)117603360
41t0,1,2,5Penticantitruncated 7-simplex (tegro)(0,0,1,1,1,2,3,4)184803360
42t0,1,3,5Pentiruncitruncated 7-simplex (tapto)(0,0,1,1,2,2,3,4)277205040
43t0,2,3,5Pentiruncicantellated 7-simplex (tapro)(0,0,1,1,2,3,3,4)252005040
44t1,2,3,5Bistericantitruncated 7-simplex (bacogro)(0,0,1,1,2,3,4,4)226805040
45t0,1,4,5Pentisteritruncated 7-simplex (tecto)(0,0,1,2,2,2,3,4)151203360
46t0,2,4,5Pentistericantellated 7-simplex (tecro)(0,0,1,2,2,3,3,4)252005040
47t1,2,4,5Bisteriruncitruncated 7-simplex (bicpath)(0,0,1,2,2,3,4,4)201605040
48t0,3,4,5Pentisteriruncinated 7-simplex (tacpo)(0,0,1,2,3,3,3,4)151203360
49t0,1,2,6Hexicantitruncated 7-simplex (pugro)(0,1,1,1,1,2,3,4)84001680
50t0,1,3,6Hexiruncitruncated 7-simplex (pugato)(0,1,1,1,2,2,3,4)201603360
51t0,2,3,6Hexiruncicantellated 7-simplex (pugro)(0,1,1,1,2,3,3,4)168003360
52t0,1,4,6Hexisteritruncated 7-simplex (pucto)(0,1,1,2,2,2,3,4)201603360
53t0,2,4,6Hexistericantellated 7-simplex (pucroh)(0,1,1,2,2,3,3,4)302405040
54t0,1,5,6Hexipentitruncated 7-simplex (putath)(0,1,2,2,2,2,3,4)84001680
55t0,1,2,3,4Steriruncicantitruncated 7-simplex (gecco)(0,0,0,1,2,3,4,5)235206720
56t0,1,2,3,5Pentiruncicantitruncated 7-simplex (tegapo)(0,0,1,1,2,3,4,5)4536010080
57t0,1,2,4,5Pentistericantitruncated 7-simplex (tecagro)(0,0,1,2,2,3,4,5)4032010080
58t0,1,3,4,5Pentisteriruncitruncated 7-simplex (tacpeto)(0,0,1,2,3,3,4,5)4032010080
59t0,2,3,4,5Pentisteriruncicantellated 7-simplex (tacpro)(0,0,1,2,3,4,4,5)4032010080
60t1,2,3,4,5Bisteriruncicantitruncated 7-simplex (gabach)(0,0,1,2,3,4,5,5)3528010080
61t0,1,2,3,6Hexiruncicantitruncated 7-simplex (pugopo)(0,1,1,1,2,3,4,5)302406720
62t0,1,2,4,6Hexistericantitruncated 7-simplex (pucagro)(0,1,1,2,2,3,4,5)5040010080
63t0,1,3,4,6Hexisteriruncitruncated 7-simplex (pucpato)(0,1,1,2,3,3,4,5)4536010080
64t0,2,3,4,6Hexisteriruncicantellated 7-simplex (pucproh)(0,1,1,2,3,4,4,5)4536010080
65t0,1,2,5,6Hexipenticantitruncated 7-simplex (putagro)(0,1,2,2,2,3,4,5)302406720
66t0,1,3,5,6Hexipentiruncitruncated 7-simplex (putpath)(0,1,2,2,3,3,4,5)5040010080
67t0,1,2,3,4,5Pentisteriruncicantitruncated 7-simplex (geto)(0,0,1,2,3,4,5,6)7056020160
68t0,1,2,3,4,6Hexisteriruncicantitruncated 7-simplex (pugaco)(0,1,1,2,3,4,5,6)8064020160
69t0,1,2,3,5,6Hexipentiruncicantitruncated 7-simplex (putgapo)(0,1,2,2,3,4,5,6)8064020160
70t0,1,2,4,5,6Hexipentistericantitruncated 7-simplex (putcagroh)(0,1,2,3,3,4,5,6)8064020160
71t0,1,2,3,4,5,6Omnitruncated 7-simplex (guph)(0,1,2,3,4,5,6,7)14112040320

The B7 family

The B7 family has symmetry of order 645120 (7 factorial x 27).

There are 127 forms based on all permutations of the Coxeter-Dynkin diagrams with one or more rings. Johnson and Bowers names.

See also a list of B7 polytopes for symmetric Coxeter plane graphs of these polytopes.

# Coxeter-Dynkin diagram
t-notation
Name (BSA) Base point Element counts
6543210
1
t0{3,3,3,3,3,4}
7-orthoplex (zee)(0,0,0,0,0,0,1)√21284486725602808414
2
t1{3,3,3,3,3,4}
Rectified 7-orthoplex (rez)(0,0,0,0,0,1,1)√2142134433603920252084084
3
t2{3,3,3,3,3,4}
Birectified 7-orthoplex (barz)(0,0,0,0,1,1,1)√2142142860481064089603360280
4
t3{4,3,3,3,3,3}
Trirectified 7-cube (sez)(0,0,0,1,1,1,1)√21421428632814560156806720560
5
t2{4,3,3,3,3,3}
Birectified 7-cube (bersa)(0,0,1,1,1,1,1)√21421428565611760134406720672
6
t1{4,3,3,3,3,3}
Rectified 7-cube (rasa)(0,1,1,1,1,1,1)√21429802968504051522688448
7
t0{4,3,3,3,3,3}
7-cube (hept)(0,0,0,0,0,0,0)√2 + (1,1,1,1,1,1,1)1484280560672448128
8
t0,1{3,3,3,3,3,4}
Truncated 7-orthoplex (Taz)(0,0,0,0,0,1,2)√21421344336047602520924168
9
t0,2{3,3,3,3,3,4}
Cantellated 7-orthoplex (Sarz)(0,0,0,0,1,1,2)√222642001545624080193207560840
10
t1,2{3,3,3,3,3,4}
Bitruncated 7-orthoplex (Botaz)(0,0,0,0,1,2,2)√2 4200840
11
t0,3{3,3,3,3,3,4}
Runcinated 7-orthoplex (Spaz)(0,0,0,1,1,1,2)√2 235202240
12
t1,3{3,3,3,3,3,4}
Bicantellated 7-orthoplex (Sebraz)(0,0,0,1,1,2,2)√2 268803360
13
t2,3{3,3,3,3,3,4}
Tritruncated 7-orthoplex (Totaz)(0,0,0,1,2,2,2)√2 100802240
14
t0,4{3,3,3,3,3,4}
Stericated 7-orthoplex (Scaz)(0,0,1,1,1,1,2)√2 336003360
15
t1,4{3,3,3,3,3,4}
Biruncinated 7-orthoplex (Sibpaz)(0,0,1,1,1,2,2)√2 604806720
16
t2,4{4,3,3,3,3,3}
Tricantellated 7-cube (Strasaz)(0,0,1,1,2,2,2)√2 470406720
17
t2,3{4,3,3,3,3,3}
Tritruncated 7-cube (Tatsa)(0,0,1,2,2,2,2)√2 134403360
18
t0,5{3,3,3,3,3,4}
Pentellated 7-orthoplex (Staz)(0,1,1,1,1,1,2)√2 201602688
19
t1,5{4,3,3,3,3,3}
Bistericated 7-cube (Sabcosaz)(0,1,1,1,1,2,2)√2 537606720
20
t1,4{4,3,3,3,3,3}
Biruncinated 7-cube (Sibposa)(0,1,1,1,2,2,2)√2 672008960
21
t1,3{4,3,3,3,3,3}
Bicantellated 7-cube (Sibrosa)(0,1,1,2,2,2,2)√2 403206720
22
t1,2{4,3,3,3,3,3}
Bitruncated 7-cube (Betsa)(0,1,2,2,2,2,2)√2 94082688
23
t0,6{4,3,3,3,3,3}
Hexicated 7-cube (Suposaz)(0,0,0,0,0,0,1)√2 + (1,1,1,1,1,1,1) 5376896
24
t0,5{4,3,3,3,3,3}
Pentellated 7-cube (Stesa)(0,0,0,0,0,1,1)√2 + (1,1,1,1,1,1,1) 201602688
25
t0,4{4,3,3,3,3,3}
Stericated 7-cube (Scosa)(0,0,0,0,1,1,1)√2 + (1,1,1,1,1,1,1) 358404480
26
t0,3{4,3,3,3,3,3}
Runcinated 7-cube (Spesa)(0,0,0,1,1,1,1)√2 + (1,1,1,1,1,1,1) 336004480
27
t0,2{4,3,3,3,3,3}
Cantellated 7-cube (Sersa)(0,0,1,1,1,1,1)√2 + (1,1,1,1,1,1,1) 161282688
28
t0,1{4,3,3,3,3,3}
Truncated 7-cube (Tasa)(0,1,1,1,1,1,1)√2 + (1,1,1,1,1,1,1)1429802968504051523136896
29
t0,1,2{3,3,3,3,3,4}
Cantitruncated 7-orthoplex (Garz)(0,1,2,3,3,3,3)√2 84001680
30
t0,1,3{3,3,3,3,3,4}
Runcitruncated 7-orthoplex (Potaz)(0,1,2,2,3,3,3)√2 504006720
31
t0,2,3{3,3,3,3,3,4}
Runcicantellated 7-orthoplex (Parz)(0,1,1,2,3,3,3)√2 336006720
32
t1,2,3{3,3,3,3,3,4}
Bicantitruncated 7-orthoplex (Gebraz)(0,0,1,2,3,3,3)√2 302406720
33
t0,1,4{3,3,3,3,3,4}
Steritruncated 7-orthoplex (Catz)(0,0,1,1,1,2,3)√2 10752013440
34
t0,2,4{3,3,3,3,3,4}
Stericantellated 7-orthoplex (Craze)(0,0,1,1,2,2,3)√2 14112020160
35
t1,2,4{3,3,3,3,3,4}
Biruncitruncated 7-orthoplex (Baptize)(0,0,1,1,2,3,3)√2 12096020160
36
t0,3,4{3,3,3,3,3,4}
Steriruncinated 7-orthoplex (Copaz)(0,1,1,1,2,3,3)√2 6720013440
37
t1,3,4{3,3,3,3,3,4}
Biruncicantellated 7-orthoplex (Boparz)(0,0,1,2,2,3,3)√2 10080020160
38
t2,3,4{4,3,3,3,3,3}
Tricantitruncated 7-cube (Gotrasaz)(0,0,0,1,2,3,3)√2 5376013440
39
t0,1,5{3,3,3,3,3,4}
Pentitruncated 7-orthoplex (Tetaz)(0,1,1,1,1,2,3)√2 8736013440
40
t0,2,5{3,3,3,3,3,4}
Penticantellated 7-orthoplex (Teroz)(0,1,1,1,2,2,3)√2 18816026880
41
t1,2,5{3,3,3,3,3,4}
Bisteritruncated 7-orthoplex (Boctaz)(0,1,1,1,2,3,3)√2 14784026880
42
t0,3,5{3,3,3,3,3,4}
Pentiruncinated 7-orthoplex (Topaz)(0,1,1,2,2,2,3)√2 17472026880
43
t1,3,5{4,3,3,3,3,3}
Bistericantellated 7-cube (Bacresaz)(0,1,1,2,2,3,3)√2 24192040320
44
t1,3,4{4,3,3,3,3,3}
Biruncicantellated 7-cube (Bopresa)(0,1,1,2,3,3,3)√2 12096026880
45
t0,4,5{3,3,3,3,3,4}
Pentistericated 7-orthoplex (Tocaz)(0,1,2,2,2,2,3)√2 6720013440
46
t1,2,5{4,3,3,3,3,3}
Bisteritruncated 7-cube (Bactasa)(0,1,2,2,2,3,3)√2 14784026880
47
t1,2,4{4,3,3,3,3,3}
Biruncitruncated 7-cube (Biptesa)(0,1,2,2,3,3,3)√2 13440026880
48
t1,2,3{4,3,3,3,3,3}
Bicantitruncated 7-cube (Gibrosa)(0,1,2,3,3,3,3)√2 4704013440
49
t0,1,6{3,3,3,3,3,4}
Hexitruncated 7-orthoplex (Putaz)(0,0,0,0,0,1,2)√2 + (1,1,1,1,1,1,1) 295685376
50
t0,2,6{3,3,3,3,3,4}
Hexicantellated 7-orthoplex (Puraz)(0,0,0,0,1,1,2)√2 + (1,1,1,1,1,1,1) 9408013440
51
t0,4,5{4,3,3,3,3,3}
Pentistericated 7-cube (Tacosa)(0,0,0,0,1,2,2)√2 + (1,1,1,1,1,1,1) 6720013440
52
t0,3,6{4,3,3,3,3,3}
Hexiruncinated 7-cube (Pupsez)(0,0,0,1,1,1,2)√2 + (1,1,1,1,1,1,1) 13440017920
53
t0,3,5{4,3,3,3,3,3}
Pentiruncinated 7-cube (Tapsa)(0,0,0,1,1,2,2)√2 + (1,1,1,1,1,1,1) 17472026880
54
t0,3,4{4,3,3,3,3,3}
Steriruncinated 7-cube (Capsa)(0,0,0,1,2,2,2)√2 + (1,1,1,1,1,1,1) 8064017920
55
t0,2,6{4,3,3,3,3,3}
Hexicantellated 7-cube (Purosa)(0,0,1,1,1,1,2)√2 + (1,1,1,1,1,1,1) 9408013440
56
t0,2,5{4,3,3,3,3,3}
Penticantellated 7-cube (Tersa)(0,0,1,1,1,2,2)√2 + (1,1,1,1,1,1,1) 18816026880
57
t0,2,4{4,3,3,3,3,3}
Stericantellated 7-cube (Carsa)(0,0,1,1,2,2,2)√2 + (1,1,1,1,1,1,1) 16128026880
58
t0,2,3{4,3,3,3,3,3}
Runcicantellated 7-cube (Parsa)(0,0,1,2,2,2,2)√2 + (1,1,1,1,1,1,1) 5376013440
59
t0,1,6{4,3,3,3,3,3}
Hexitruncated 7-cube (Putsa)(0,1,1,1,1,1,2)√2 + (1,1,1,1,1,1,1) 295685376
60
t0,1,5{4,3,3,3,3,3}
Pentitruncated 7-cube (Tetsa)(0,1,1,1,1,2,2)√2 + (1,1,1,1,1,1,1) 8736013440
61
t0,1,4{4,3,3,3,3,3}
Steritruncated 7-cube (Catsa)(0,1,1,1,2,2,2)√2 + (1,1,1,1,1,1,1) 11648017920
62
t0,1,3{4,3,3,3,3,3}
Runcitruncated 7-cube (Petsa)(0,1,1,2,2,2,2)√2 + (1,1,1,1,1,1,1) 7392013440
63
t0,1,2{4,3,3,3,3,3}
Cantitruncated 7-cube (Gersa)(0,1,2,2,2,2,2)√2 + (1,1,1,1,1,1,1) 188165376
64
t0,1,2,3{3,3,3,3,3,4}
Runcicantitruncated 7-orthoplex (Gopaz)(0,1,2,3,4,4,4)√2 6048013440
65
t0,1,2,4{3,3,3,3,3,4}
Stericantitruncated 7-orthoplex (Cogarz)(0,0,1,1,2,3,4)√2 24192040320
66
t0,1,3,4{3,3,3,3,3,4}
Steriruncitruncated 7-orthoplex (Captaz)(0,0,1,2,2,3,4)√2 18144040320
67
t0,2,3,4{3,3,3,3,3,4}
Steriruncicantellated 7-orthoplex (Caparz)(0,0,1,2,3,3,4)√2 18144040320
68
t1,2,3,4{3,3,3,3,3,4}
Biruncicantitruncated 7-orthoplex (Gibpaz)(0,0,1,2,3,4,4)√2 16128040320
69
t0,1,2,5{3,3,3,3,3,4}
Penticantitruncated 7-orthoplex (Tograz)(0,1,1,1,2,3,4)√2 29568053760
70
t0,1,3,5{3,3,3,3,3,4}
Pentiruncitruncated 7-orthoplex (Toptaz)(0,1,1,2,2,3,4)√2 44352080640
71
t0,2,3,5{3,3,3,3,3,4}
Pentiruncicantellated 7-orthoplex (Toparz)(0,1,1,2,3,3,4)√2 40320080640
72
t1,2,3,5{3,3,3,3,3,4}
Bistericantitruncated 7-orthoplex (Becogarz)(0,1,1,2,3,4,4)√2 36288080640
73
t0,1,4,5{3,3,3,3,3,4}
Pentisteritruncated 7-orthoplex (Tacotaz)(0,1,2,2,2,3,4)√2 24192053760
74
t0,2,4,5{3,3,3,3,3,4}
Pentistericantellated 7-orthoplex (Tocarz)(0,1,2,2,3,3,4)√2 40320080640
75
t1,2,4,5{4,3,3,3,3,3}
Bisteriruncitruncated 7-cube (Bocaptosaz)(0,1,2,2,3,4,4)√2 32256080640
76
t0,3,4,5{3,3,3,3,3,4}
Pentisteriruncinated 7-orthoplex (Tecpaz)(0,1,2,3,3,3,4)√2 24192053760
77
t1,2,3,5{4,3,3,3,3,3}
Bistericantitruncated 7-cube (Becgresa)(0,1,2,3,3,4,4)√2 36288080640
78
t1,2,3,4{4,3,3,3,3,3}
Biruncicantitruncated 7-cube (Gibposa)(0,1,2,3,4,4,4)√2 18816053760
79
t0,1,2,6{3,3,3,3,3,4}
Hexicantitruncated 7-orthoplex (Pugarez)(0,0,0,0,1,2,3)√2 + (1,1,1,1,1,1,1) 13440026880
80
t0,1,3,6{3,3,3,3,3,4}
Hexiruncitruncated 7-orthoplex (Papataz)(0,0,0,1,1,2,3)√2 + (1,1,1,1,1,1,1) 32256053760
81
t0,2,3,6{3,3,3,3,3,4}
Hexiruncicantellated 7-orthoplex (Puparez)(0,0,0,1,2,2,3)√2 + (1,1,1,1,1,1,1) 26880053760
82
t0,3,4,5{4,3,3,3,3,3}
Pentisteriruncinated 7-cube (Tecpasa)(0,0,0,1,2,3,3)√2 + (1,1,1,1,1,1,1) 24192053760
83
t0,1,4,6{3,3,3,3,3,4}
Hexisteritruncated 7-orthoplex (Pucotaz)(0,0,1,1,1,2,3)√2 + (1,1,1,1,1,1,1) 32256053760
84
t0,2,4,6{4,3,3,3,3,3}
Hexistericantellated 7-cube (Pucrosaz)(0,0,1,1,2,2,3)√2 + (1,1,1,1,1,1,1) 48384080640
85
t0,2,4,5{4,3,3,3,3,3}
Pentistericantellated 7-cube (Tecresa)(0,0,1,1,2,3,3)√2 + (1,1,1,1,1,1,1) 40320080640
86
t0,2,3,6{4,3,3,3,3,3}
Hexiruncicantellated 7-cube (Pupresa)(0,0,1,2,2,2,3)√2 + (1,1,1,1,1,1,1) 26880053760
87
t0,2,3,5{4,3,3,3,3,3}
Pentiruncicantellated 7-cube (Topresa)(0,0,1,2,2,3,3)√2 + (1,1,1,1,1,1,1) 40320080640
88
t0,2,3,4{4,3,3,3,3,3}
Steriruncicantellated 7-cube (Copresa)(0,0,1,2,3,3,3)√2 + (1,1,1,1,1,1,1) 21504053760
89
t0,1,5,6{4,3,3,3,3,3}
Hexipentitruncated 7-cube (Putatosez)(0,1,1,1,1,2,3)√2 + (1,1,1,1,1,1,1) 13440026880
90
t0,1,4,6{4,3,3,3,3,3}
Hexisteritruncated 7-cube (Pacutsa)(0,1,1,1,2,2,3)√2 + (1,1,1,1,1,1,1) 32256053760
91
t0,1,4,5{4,3,3,3,3,3}
Pentisteritruncated 7-cube (Tecatsa)(0,1,1,1,2,3,3)√2 + (1,1,1,1,1,1,1) 24192053760
92
t0,1,3,6{4,3,3,3,3,3}
Hexiruncitruncated 7-cube (Pupetsa)(0,1,1,2,2,2,3)√2 + (1,1,1,1,1,1,1) 32256053760
93
t0,1,3,5{4,3,3,3,3,3}
Pentiruncitruncated 7-cube (Toptosa)(0,1,1,2,2,3,3)√2 + (1,1,1,1,1,1,1) 44352080640
94
t0,1,3,4{4,3,3,3,3,3}
Steriruncitruncated 7-cube (Captesa)(0,1,1,2,3,3,3)√2 + (1,1,1,1,1,1,1) 21504053760
95
t0,1,2,6{4,3,3,3,3,3}
Hexicantitruncated 7-cube (Pugrosa)(0,1,2,2,2,2,3)√2 + (1,1,1,1,1,1,1) 13440026880
96
t0,1,2,5{4,3,3,3,3,3}
Penticantitruncated 7-cube (Togresa)(0,1,2,2,2,3,3)√2 + (1,1,1,1,1,1,1) 29568053760
97
t0,1,2,4{4,3,3,3,3,3}
Stericantitruncated 7-cube (Cogarsa)(0,1,2,2,3,3,3)√2 + (1,1,1,1,1,1,1) 26880053760
98
t0,1,2,3{4,3,3,3,3,3}
Runcicantitruncated 7-cube (Gapsa)(0,1,2,3,3,3,3)√2 + (1,1,1,1,1,1,1) 9408026880
99
t0,1,2,3,4{3,3,3,3,3,4}
Steriruncicantitruncated 7-orthoplex (Gocaz)(0,0,1,2,3,4,5)√2 32256080640
100
t0,1,2,3,5{3,3,3,3,3,4}
Pentiruncicantitruncated 7-orthoplex (Tegopaz)(0,1,1,2,3,4,5)√2 725760161280
101
t0,1,2,4,5{3,3,3,3,3,4}
Pentistericantitruncated 7-orthoplex (Tecagraz)(0,1,2,2,3,4,5)√2 645120161280
102
t0,1,3,4,5{3,3,3,3,3,4}
Pentisteriruncitruncated 7-orthoplex (Tecpotaz)(0,1,2,3,3,4,5)√2 645120161280
103
t0,2,3,4,5{3,3,3,3,3,4}
Pentisteriruncicantellated 7-orthoplex (Tacparez)(0,1,2,3,4,4,5)√2 645120161280
104
t1,2,3,4,5{4,3,3,3,3,3}
Bisteriruncicantitruncated 7-cube (Gabcosaz)(0,1,2,3,4,5,5)√2 564480161280
105
t0,1,2,3,6{3,3,3,3,3,4}
Hexiruncicantitruncated 7-orthoplex (Pugopaz)(0,0,0,1,2,3,4)√2 + (1,1,1,1,1,1,1) 483840107520
106
t0,1,2,4,6{3,3,3,3,3,4}
Hexistericantitruncated 7-orthoplex (Pucagraz)(0,0,1,1,2,3,4)√2 + (1,1,1,1,1,1,1) 806400161280
107
t0,1,3,4,6{3,3,3,3,3,4}
Hexisteriruncitruncated 7-orthoplex (Pucpotaz)(0,0,1,2,2,3,4)√2 + (1,1,1,1,1,1,1) 725760161280
108
t0,2,3,4,6{4,3,3,3,3,3}
Hexisteriruncicantellated 7-cube (Pucprosaz)(0,0,1,2,3,3,4)√2 + (1,1,1,1,1,1,1) 725760161280
109
t0,2,3,4,5{4,3,3,3,3,3}
Pentisteriruncicantellated 7-cube (Tocpresa)(0,0,1,2,3,4,4)√2 + (1,1,1,1,1,1,1) 645120161280
110
t0,1,2,5,6{3,3,3,3,3,4}
Hexipenticantitruncated 7-orthoplex (Putegraz)(0,1,1,1,2,3,4)√2 + (1,1,1,1,1,1,1) 483840107520
111
t0,1,3,5,6{4,3,3,3,3,3}
Hexipentiruncitruncated 7-cube (Putpetsaz)(0,1,1,2,2,3,4)√2 + (1,1,1,1,1,1,1) 806400161280
112
t0,1,3,4,6{4,3,3,3,3,3}
Hexisteriruncitruncated 7-cube (Pucpetsa)(0,1,1,2,3,3,4)√2 + (1,1,1,1,1,1,1) 725760161280
113
t0,1,3,4,5{4,3,3,3,3,3}
Pentisteriruncitruncated 7-cube (Tecpetsa)(0,1,1,2,3,4,4)√2 + (1,1,1,1,1,1,1) 645120161280
114
t0,1,2,5,6{4,3,3,3,3,3}
Hexipenticantitruncated 7-cube (Putgresa)(0,1,2,2,2,3,4)√2 + (1,1,1,1,1,1,1) 483840107520
115
t0,1,2,4,6{4,3,3,3,3,3}
Hexistericantitruncated 7-cube (Pucagrosa)(0,1,2,2,3,3,4)√2 + (1,1,1,1,1,1,1) 806400161280
116
t0,1,2,4,5{4,3,3,3,3,3}
Pentistericantitruncated 7-cube (Tecgresa)(0,1,2,2,3,4,4)√2 + (1,1,1,1,1,1,1) 645120161280
117
t0,1,2,3,6{4,3,3,3,3,3}
Hexiruncicantitruncated 7-cube (Pugopsa)(0,1,2,3,3,3,4)√2 + (1,1,1,1,1,1,1) 483840107520
118
t0,1,2,3,5{4,3,3,3,3,3}
Pentiruncicantitruncated 7-cube (Togapsa)(0,1,2,3,3,4,4)√2 + (1,1,1,1,1,1,1) 725760161280
119
t0,1,2,3,4{4,3,3,3,3,3}
Steriruncicantitruncated 7-cube (Gacosa)(0,1,2,3,4,4,4)√2 + (1,1,1,1,1,1,1) 376320107520
120
t0,1,2,3,4,5{3,3,3,3,3,4}
Pentisteriruncicantitruncated 7-orthoplex (Gotaz)(0,1,2,3,4,5,6)√2 1128960322560
121
t0,1,2,3,4,6{3,3,3,3,3,4}
Hexisteriruncicantitruncated 7-orthoplex (Pugacaz)(0,0,1,2,3,4,5)√2 + (1,1,1,1,1,1,1) 1290240322560
122
t0,1,2,3,5,6{3,3,3,3,3,4}
Hexipentiruncicantitruncated 7-orthoplex (Putgapaz)(0,1,1,2,3,4,5)√2 + (1,1,1,1,1,1,1) 1290240322560
123
t0,1,2,4,5,6{4,3,3,3,3,3}
Hexipentistericantitruncated 7-cube (Putcagrasaz)(0,1,2,2,3,4,5)√2 + (1,1,1,1,1,1,1) 1290240322560
124
t0,1,2,3,5,6{4,3,3,3,3,3}
Hexipentiruncicantitruncated 7-cube (Putgapsa)(0,1,2,3,3,4,5)√2 + (1,1,1,1,1,1,1) 1290240322560
125
t0,1,2,3,4,6{4,3,3,3,3,3}
Hexisteriruncicantitruncated 7-cube (Pugacasa)(0,1,2,3,4,4,5)√2 + (1,1,1,1,1,1,1) 1290240322560
126
t0,1,2,3,4,5{4,3,3,3,3,3}
Pentisteriruncicantitruncated 7-cube (Gotesa)(0,1,2,3,4,5,5)√2 + (1,1,1,1,1,1,1) 1128960322560
127
t0,1,2,3,4,5,6{4,3,3,3,3,3}
Omnitruncated 7-cube (Guposaz)(0,1,2,3,4,5,6)√2 + (1,1,1,1,1,1,1) 2257920645120

The D7 family

The D7 family has symmetry of order 322560 (7 factorial x 26).

This family has 3×32−1=95 Wythoffian uniform polytopes, generated by marking one or more nodes of the D7 Coxeter-Dynkin diagram. Of these, 63 (2×32−1) are repeated from the B7 family and 32 are unique to this family, listed below. Bowers names and acronym are given for cross-referencing.

See also list of D7 polytopes for Coxeter plane graphs of these polytopes.

# Coxeter diagram Names Base point
(Alternately signed)
Element counts
6543210
1 = 7-demicube
Demihepteract (Hesa)
(1,1,1,1,1,1,1)7853216242800224067264
2 = Truncated 7-demicube
Truncated demihepteract (Thesa)
(1,1,3,3,3,3,3)14214285656117601344073921344
3 = Cantellated 7-demicube
Small rhombated demihepteract (Sirhesa)
(1,1,1,3,3,3,3) 168002240
4 = Runcinated 7-demicube
Small prismated demihepteract (Sphosa)
(1,1,1,1,3,3,3) 201602240
5 = Stericated 7-demicube
Small cellated demihepteract (Sochesa)
(1,1,1,1,1,3,3) 134401344
6 = Pentellated 7-demicube
Small terated demihepteract (Suthesa)
(1,1,1,1,1,1,3) 4704448
7 = Cantitruncated 7-demicube
Great rhombated demihepteract (Girhesa)
(1,1,3,5,5,5,5) 235206720
8 = Runcitruncated 7-demicube
Prismatotruncated demihepteract (Pothesa)
(1,1,3,3,5,5,5) 7392013440
9 = Runcicantellated 7-demicube
Prismatorhomated demihepteract (Prohesa)
(1,1,1,3,5,5,5) 403208960
10 = Steritruncated 7-demicube
Cellitruncated demihepteract (Cothesa)
(1,1,3,3,3,5,5) 8736013440
11 = Stericantellated 7-demicube
Cellirhombated demihepteract (Crohesa)
(1,1,1,3,3,5,5) 8736013440
12 = Steriruncinated 7-demicube
Celliprismated demihepteract (Caphesa)
(1,1,1,1,3,5,5) 403206720
13 = Pentitruncated 7-demicube
Teritruncated demihepteract (Tuthesa)
(1,1,3,3,3,3,5) 436806720
14 = Penticantellated 7-demicube
Terirhombated demihepteract (Turhesa)
(1,1,1,3,3,3,5) 672008960
15 = Pentiruncinated 7-demicube
Teriprismated demihepteract (Tuphesa)
(1,1,1,1,3,3,5) 537606720
16 = Pentistericated 7-demicube
Tericellated demihepteract (Tuchesa)
(1,1,1,1,1,3,5) 215042688
17 = Runcicantitruncated 7-demicube
Great prismated demihepteract (Gephosa)
(1,1,3,5,7,7,7) 9408026880
18 = Stericantitruncated 7-demicube
Celligreatorhombated demihepteract (Cagrohesa)
(1,1,3,5,5,7,7) 18144040320
19 = Steriruncitruncated 7-demicube
Celliprismatotruncated demihepteract (Capthesa)
(1,1,3,3,5,7,7) 18144040320
20 = Steriruncicantellated 7-demicube
Celliprismatorhombated demihepteract (Coprahesa)
(1,1,1,3,5,7,7) 12096026880
21 = Penticantitruncated 7-demicube
Terigreatorhombated demihepteract (Tugrohesa)
(1,1,3,5,5,5,7) 12096026880
22 = Pentiruncitruncated 7-demicube
Teriprismatotruncated demihepteract (Tupthesa)
(1,1,3,3,5,5,7) 22176040320
23 = Pentiruncicantellated 7-demicube
Teriprismatorhombated demihepteract (Tuprohesa)
(1,1,1,3,5,5,7) 13440026880
24 = Pentisteritruncated 7-demicube
Tericellitruncated demihepteract (Tucothesa)
(1,1,3,3,3,5,7) 14784026880
25 = Pentistericantellated 7-demicube
Tericellirhombated demihepteract (Tucrohesa)
(1,1,1,3,3,5,7) 16128026880
26 = Pentisteriruncinated 7-demicube
Tericelliprismated demihepteract (Tucophesa)
(1,1,1,1,3,5,7) 8064013440
27 = Steriruncicantitruncated 7-demicube
Great cellated demihepteract (Gochesa)
(1,1,3,5,7,9,9) 28224080640
28 = Pentiruncicantitruncated 7-demicube
Terigreatoprimated demihepteract (Tugphesa)
(1,1,3,5,7,7,9) 32256080640
29 = Pentistericantitruncated 7-demicube
Tericelligreatorhombated demihepteract (Tucagrohesa)
(1,1,3,5,5,7,9) 32256080640
30 = Pentisteriruncitruncated 7-demicube
Tericelliprismatotruncated demihepteract (Tucpathesa)
(1,1,3,3,5,7,9) 36288080640
31 = Pentisteriruncicantellated 7-demicube
Tericellprismatorhombated demihepteract (Tucprohesa)
(1,1,1,3,5,7,9) 24192053760
32 = Pentisteriruncicantitruncated 7-demicube
Great terated demihepteract (Guthesa)
(1,1,3,5,7,9,11) 564480161280

The E7 family

The E7 Coxeter group has order 2,903,040.

There are 127 forms based on all permutations of the Coxeter-Dynkin diagrams with one or more rings.

See also a list of E7 polytopes for symmetric Coxeter plane graphs of these polytopes.

# Coxeter-Dynkin diagram
Schläfli symbol
Names Element counts
6 5 4 3 2 1 0
1231 (laq)63247881612820160100802016126
2Rectified 231 (rolaq)758103324788010080090720302402016
3Rectified 132 (rolin)758123487207219152024192012096010080
4132 (lin)182428423688504004032010080576
5Birectified 321 (branq)7581234868040161280161280604804032
6Rectified 321 (ranq)7584435270560483841159212096756
7321 (naq)70260481209610080403275656
8Truncated 231 (talq)758103324788010080090720322564032
9Cantellated 231 (sirlaq) 13104020160
10Bitruncated 231 (botlaq)30240
11small demified 231 (shilq)27742242878120151200131040423364032
12demirectified 231 (hirlaq)12096
13truncated 132 (tolin)20160
14small demiprismated 231 (shiplaq)20160
15birectified 132 (berlin)7582242814263240320054432030240040320
16tritruncated 321 (totanq)40320
17demibirectified 321 (hobranq)20160
18small cellated 231 (scalq)7560
19small biprismated 231 (sobpalq)30240
20small birhombated 321 (sabranq)60480
21demirectified 321 (harnaq)12096
22bitruncated 321 (botnaq)12096
23small terated 321 (stanq)1512
24small demicellated 321 (shocanq)12096
25small prismated 321 (spanq)40320
26small demified 321 (shanq)4032
27small rhombated 321 (sranq)12096
28Truncated 321 (tanq)75811592483847056044352128521512
29great rhombated 231 (girlaq)60480
30demitruncated 231 (hotlaq)24192
31small demirhombated 231 (sherlaq)60480
32demibitruncated 231 (hobtalq)60480
33demiprismated 231 (hiptalq)80640
34demiprismatorhombated 231 (hiprolaq)120960
35bitruncated 132 (batlin)120960
36small prismated 231 (spalq)80640
37small rhombated 132 (sirlin)120960
38tritruncated 231 (tatilq)80640
39cellitruncated 231 (catalaq)60480
40cellirhombated 231 (crilq)362880
41biprismatotruncated 231 (biptalq)181440
42small prismated 132 (seplin)60480
43small biprismated 321 (sabipnaq)120960
44small demibirhombated 321 (shobranq)120960
45cellidemiprismated 231 (chaplaq)60480
46demibiprismatotruncated 321 (hobpotanq)120960
47great birhombated 321 (gobranq)120960
48demibitruncated 321 (hobtanq)60480
49teritruncated 231 (totalq)24192
50terirhombated 231 (trilq)120960
51demicelliprismated 321 (hicpanq)120960
52small teridemified 231 (sethalq)24192
53small cellated 321 (scanq)60480
54demiprismated 321 (hipnaq)80640
55terirhombated 321 (tranq)60480
56demicellirhombated 321 (hocranq)120960
57prismatorhombated 321 (pranq)120960
58small demirhombated 321 (sharnaq)60480
59teritruncated 321 (tetanq)15120
60demicellitruncated 321 (hictanq)60480
61prismatotruncated 321 (potanq)120960
62demitruncated 321 (hotnaq)24192
63great rhombated 321 (granq)24192
64great demified 231 (gahlaq)120960
65great demiprismated 231 (gahplaq)241920
66prismatotruncated 231 (potlaq)241920
67prismatorhombated 231 (prolaq)241920
68great rhombated 132 (girlin)241920
69celligreatorhombated 231 (cagrilq)362880
70cellidemitruncated 231 (chotalq)241920
71prismatotruncated 132 (patlin)362880
72biprismatorhombated 321 (bipirnaq)362880
73tritruncated 132 (tatlin)241920
74cellidemiprismatorhombated 231 (chopralq)362880
75great demibiprismated 321 (ghobipnaq)362880
76celliprismated 231 (caplaq)241920
77biprismatotruncated 321 (boptanq)362880
78great trirhombated 231 (gatralaq)241920
79terigreatorhombated 231 (togrilq)241920
80teridemitruncated 231 (thotalq)120960
81teridemirhombated 231 (thorlaq)241920
82celliprismated 321 (capnaq)241920
83teridemiprismatotruncated 231 (thoptalq)241920
84teriprismatorhombated 321 (tapronaq)362880
85demicelliprismatorhombated 321 (hacpranq)362880
86teriprismated 231 (toplaq)241920
87cellirhombated 321 (cranq)362880
88demiprismatorhombated 321 (hapranq)241920
89tericellitruncated 231 (tectalq)120960
90teriprismatotruncated 321 (toptanq)362880
91demicelliprismatotruncated 321 (hecpotanq)362880
92teridemitruncated 321 (thotanq)120960
93cellitruncated 321 (catnaq)241920
94demiprismatotruncated 321 (hiptanq)241920
95terigreatorhombated 321 (tagranq)120960
96demicelligreatorhombated 321 (hicgarnq)241920
97great prismated 321 (gopanq)241920
98great demirhombated 321 (gahranq)120960
99great prismated 231 (gopalq)483840
100great cellidemified 231 (gechalq)725760
101great birhombated 132 (gebrolin)725760
102prismatorhombated 132 (prolin)725760
103celliprismatorhombated 231 (caprolaq)725760
104great biprismated 231 (gobpalq)725760
105tericelliprismated 321 (ticpanq)483840
106teridemigreatoprismated 231 (thegpalq)725760
107teriprismatotruncated 231 (teptalq)725760
108teriprismatorhombated 231 (topralq)725760
109cellipriemsatorhombated 321 (copranq)725760
110tericelligreatorhombated 231 (tecgrolaq)725760
111tericellitruncated 321 (tectanq)483840
112teridemiprismatotruncated 321 (thoptanq)725760
113celliprismatotruncated 321 (coptanq)725760
114teridemicelligreatorhombated 321 (thocgranq)483840
115terigreatoprismated 321 (tagpanq)725760
116great demicellated 321 (gahcnaq)725760
117tericelliprismated laq (tecpalq)483840
118celligreatorhombated 321 (cogranq)725760
119great demified 321 (gahnq)483840
120great cellated 231 (gocalq)1451520
121terigreatoprismated 231 (tegpalq)1451520
122tericelliprismatotruncated 321 (tecpotniq)1451520
123tericellidemigreatoprismated 231 (techogaplaq)1451520
124tericelligreatorhombated 321 (tacgarnq)1451520
125tericelliprismatorhombated 231 (tecprolaq)1451520
126great cellated 321 (gocanq)1451520
127great terated 321 (gotanq)2903040

Regular and uniform honeycombs

Coxeter-Dynkin diagram correspondences between families and higher symmetry within diagrams. Nodes of the same color in each row represent identical mirrors. Black nodes are not active in the correspondence.

There are five fundamental affine Coxeter groups and sixteen prismatic groups that generate regular and uniform tessellations in 6-space:

# Coxeter group Coxeter diagram Forms
1{{\tilde  {A}}}_{6}[3[7]]17
2{{\tilde  {C}}}_{6}[4,34,4]71
3{{\tilde  {B}}}_{6}h[4,34,4]
[4,33,31,1]
95 (32 new)
4{{\tilde  {D}}}_{6}q[4,34,4]
[31,1,32,31,1]
41 (6 new)
5{{\tilde  {E}}}_{6}[32,2,2]39

Regular and uniform tessellations include:

  • {{\tilde  {A}}}_{6}, 17 forms
  • {{\tilde  {C}}}_{6}, [4,34,4], 71 forms
    • Regular 6-cube honeycomb, represented by symbols {4,34,4},
  • {{\tilde  {B}}}_{6}, [31,1,33,4], 95 forms, 64 shared with {{\tilde  {C}}}_{6}, 32 new
    • Uniform 6-demicube honeycomb, represented by symbols h{4,34,4} = {31,1,33,4}, =
  • {{\tilde  {D}}}_{6}, [31,1,32,31,1], 41 unique ringed permuations, most shared with {{\tilde  {B}}}_{6} and {{\tilde  {C}}}_{6}, and 6 are new. Coxeter calls the first one a quarter 6-cubic honeycomb.
    • , , , , ,
  • {{\tilde  {E}}}_{6}: [32,2,2], 39 forms
    • Uniform 222 honeycomb: represented by symbols {32,2,2},
Prismatic groups
# Coxeter group Coxeter-Dynkin diagram
1{{\tilde  {A}}}_{5}x{{\tilde  {I}}}_{1}[3[6],2,∞]
2{{\tilde  {B}}}_{5}x{{\tilde  {I}}}_{1}[4,3,31,1,2,∞]
3{{\tilde  {C}}}_{5}x{{\tilde  {I}}}_{1}[4,33,4,2,∞]
4{{\tilde  {D}}}_{5}x{{\tilde  {I}}}_{1}[31,1,3,31,1,2,∞]
5{{\tilde  {A}}}_{4}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}[3[5],2,∞,2,∞,2,∞]
6{{\tilde  {B}}}_{4}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}[4,3,31,1,2,∞,2,∞]
7{{\tilde  {C}}}_{4}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}[4,3,3,4,2,∞,2,∞]
8{{\tilde  {D}}}_{4}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}[31,1,1,1,2,∞,2,∞]
9{{\tilde  {F}}}_{4}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}[3,4,3,3,2,∞,2,∞]
10{{\tilde  {C}}}_{3}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}[4,3,4,2,∞,2,∞,2,∞]
11{{\tilde  {B}}}_{3}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}[4,31,1,2,∞,2,∞,2,∞]
12{{\tilde  {A}}}_{3}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}[3[4],2,∞,2,∞,2,∞]
13{{\tilde  {C}}}_{2}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}[4,4,2,∞,2,∞,2,∞,2,∞]
14{{\tilde  {H}}}_{2}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}[6,3,2,∞,2,∞,2,∞,2,∞]
15{{\tilde  {A}}}_{2}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}[3[3],2,∞,2,∞,2,∞,2,∞]
16{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}x{{\tilde  {I}}}_{1}[∞,2,∞,2,∞,2,∞,2,∞]

Regular and uniform hyperbolic honeycombs

There are no compact hyperbolic Coxeter groups of rank 7, groups that can generate honeycombs with all finite facets, and a finite vertex figure. However there are 3 noncompact hyperbolic Coxeter groups of rank 7, each generating uniform honeycombs in 6-space as permutations of rings of the Coxeter diagrams.

{{\bar  {P}}}_{6} = [3,3[6]]:
{{\bar  {Q}}}_{6} = [31,1,3,32,1]:
{{\bar  {S}}}_{6} = [4,3,3,32,1]:

Notes on the Wythoff construction for the uniform 7-polytopes

The reflective 7-dimensional uniform polytopes are constructed through a Wythoff construction process, and represented by a Coxeter-Dynkin diagram, where each node represents a mirror. An active mirror is represented by a ringed node. Each combination of active mirrors generates a unique uniform polytope. Uniform polytopes are named in relation to the regular polytopes in each family. Some families have two regular constructors and thus may be named in two equally valid ways.

Here are the primary operators available for constructing and naming the uniform 7-polytopes.

The prismatic forms and bifurcating graphs can use the same truncation indexing notation, but require an explicit numbering system on the nodes for clarity.

Operation Extended
Schläfli symbol
Coxeter-
Dynkin
diagram
Description
Parent t0{p,q,r,s,t,u} Any regular 7-polytope
Rectified t1{p,q,r,s,t,u} The edges are fully truncated into single points. The 7-polytope now has the combined faces of the parent and dual.
Birectified t2{p,q,r,s,t,u} Birectification reduces cells to their duals.
Truncated t0,1{p,q,r,s,t,u} Each original vertex is cut off, with a new face filling the gap. Truncation has a degree of freedom, which has one solution that creates a uniform truncated 7-polytope. The 7-polytope has its original faces doubled in sides, and contains the faces of the dual.
Bitruncated t1,2{p,q,r,s,t,u} Bitrunction transforms cells to their dual truncation.
Tritruncated t2,3{p,q,r,s,t,u} Tritruncation transforms 4-faces to their dual truncation.
Cantellated t0,2{p,q,r,s,t,u} In addition to vertex truncation, each original edge is beveled with new rectangular faces appearing in their place. A uniform cantellation is half way between both the parent and dual forms.
Bicantellated t1,3{p,q,r,s,t,u} In addition to vertex truncation, each original edge is beveled with new rectangular faces appearing in their place. A uniform cantellation is half way between both the parent and dual forms.
Runcinated t0,3{p,q,r,s,t,u} Runcination reduces cells and creates new cells at the vertices and edges.
Biruncinated t1,4{p,q,r,s,t,u} Runcination reduces cells and creates new cells at the vertices and edges.
Stericated t0,4{p,q,r,s,t,u} Sterication reduces 4-faces and creates new 4-faces at the vertices, edges, and faces in the gaps.
Pentellated t0,5{p,q,r,s,t,u} Pentellation reduces 5-faces and creates new 5-faces at the vertices, edges, faces, and cells in the gaps.
Hexicated t0,6{p,q,r,s,t,u} Hexication reduces 6-faces and creates new 6-faces at the vertices, edges, faces, cells, and 4-faces in the gaps. (expansion operation for 7-polytopes)
Omnitruncated t0,1,2,3,4,5,6{p,q,r,s,t,u} All six operators, truncation, cantellation, runcination, sterication, pentellation, and hexication are applied.

References

  • T. Gosset: On the Regular and Semi-Regular Figures in Space of n Dimensions, Messenger of Mathematics, Macmillan, 1900
  • A. Boole Stott: Geometrical deduction of semiregular from regular polytopes and space fillings, Verhandelingen of the Koninklijke academy van Wetenschappen width unit Amsterdam, Eerste Sectie 11,1, Amsterdam, 1910
  • H.S.M. Coxeter:
    • H.S.M. Coxeter, M.S. Longuet-Higgins und J.C.P. Miller: Uniform Polyhedra, Philosophical Transactions of the Royal Society of London, Londne, 1954
    • H.S.M. Coxeter, Regular Polytopes, 3rd Edition, Dover New York, 1973
  • Kaleidoscopes: Selected Writings of H.S.M. Coxeter, editied by F. Arthur Sherk, Peter McMullen, Anthony C. Thompson, Asia Ivic Weiss, Wiley-Interscience Publication, 1995, ISBN 978-0-471-01003-6 http://www.wiley.com/WileyCDA/WileyTitle/productCd-0471010030.html
    • (Paper 22) H.S.M. Coxeter, Regular and Semi Regular Polytopes I, [Math. Zeit. 46 (1940) 380-407, MR 2,10]
    • (Paper 23) H.S.M. Coxeter, Regular and Semi-Regular Polytopes II, [Math. Zeit. 188 (1985) 559-591]
    • (Paper 24) H.S.M. Coxeter, Regular and Semi-Regular Polytopes III, [Math. Zeit. 200 (1988) 3-45]
  • N.W. Johnson: The Theory of Uniform Polytopes and Honeycombs, Ph.D. Dissertation, University of Toronto, 1966
  • Richard Klitzing, 7D, uniform polytopes (polyexa)

External links

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