Acronym quittin
Name quasitruncated penteract
Field of sections
 ©
Circumradius sqrt[13-8 sqrt(2)]/2 = 0.649286
Inradius
wrt. quitit
[sqrt(2)-1]/2 = 0.207107
Inradius
wrt. pen
(5-4 sqrt(2))/sqrt(20) = -0.146877
Vertex figure
 ©
Coordinates (sqrt(2)-1, sqrt(2)-1, sqrt(2)-1, sqrt(2)-1, 1)/2   & all permutations, all changes of sign
Volume (1230-869 sqrt(2))/30 = 0.034947
Face vector 160, 400, 400, 200, 42
Confer
analogs:
quasitruncated hypercube qtCn  
External
links
hedrondude   polytopewiki  

As abstract polytope quittin is isomorphic to tan, thereby replacing octagrams by octagons, resp. quith by tic, resp. quitit by tat.

Note that the tets and pens become retrograde here.


Incidence matrix according to Dynkin symbol

o3o3o3x4/3x

. . . .   . | 160 |   4  1 |   6  4 |   4  6 |  1  4
------------+-----+--------+--------+--------+------
. . . x   . |   2 | 320  * |   3  1 |   3  3 |  1  3
. . . .   x |   2 |   * 80    0  4 |   0  6 |  0  4
------------+-----+--------+--------+--------+------
. . o3x   . |   3 |   3  0 | 320  * |   2  1 |  1  2
. . . x4/3x |   8 |   4  4 |   * 80 |   0  3 |  0  3
------------+-----+--------+--------+--------+------
. o3o3x   .    4 |   6  0 |   4  0 | 160  * |  1  1
. . o3x4/3x   24 |  24 12 |   8  6 |   * 40 |  0  2
------------+-----+--------+--------+--------+------
o3o3o3x   .    5 |  10  0 |  10  0 |   5  0 | 32  *
. o3o3x4/3x   64 |  96 32 |  64 24 |  16  8 |  * 10

o3o3o3/2x4/3x

. . .   .   . | 160 |   4  1 |   6  4 |   4  6 |  1  4
--------------+-----+--------+--------+--------+------
. . .   x   . |   2 | 320  * |   3  1 |   3  3 |  1  3
. . .   .   x |   2 |   * 80    0  4 |   0  6 |  0  4
--------------+-----+--------+--------+--------+------
. . o3/2x   . |   3 |   3  0 | 320  * |   2  1 |  1  2
. . .   x4/3x |   8 |   4  4 |   * 80 |   0  3 |  0  3
--------------+-----+--------+--------+--------+------
. o3o3/2x   .    4 |   6  0 |   4  0 | 160  * |  1  1
. . o3/2x4/3x   24 |  24 12 |   8  6 |   * 40 |  0  2
--------------+-----+--------+--------+--------+------
o3o3o3/2x   .    5 |  10  0 |  10  0 |   5  0 | 32  *
. o3o3/2x4/3x   64 |  96 32 |  64 24 |  16  8 |  * 10

o3o3/2o3x4/3x

. .   . .   . | 160 |   4  1 |   6  4 |   4  6 |  1  4
--------------+-----+--------+--------+--------+------
. .   . x   . |   2 | 320  * |   3  1 |   3  3 |  1  3
. .   . .   x |   2 |   * 80    0  4 |   0  6 |  0  4
--------------+-----+--------+--------+--------+------
. .   o3x   . |   3 |   3  0 | 320  * |   2  1 |  1  2
. .   . x4/3x |   8 |   4  4 |   * 80 |   0  3 |  0  3
--------------+-----+--------+--------+--------+------
. o3/2o3x   .    4 |   6  0 |   4  0 | 160  * |  1  1
. .   o3x4/3x   24 |  24 12 |   8  6 |   * 40 |  0  2
--------------+-----+--------+--------+--------+------
o3o3/2o3x   .    5 |  10  0 |  10  0 |   5  0 | 32  *
. o3/2o3x4/3x   64 |  96 32 |  64 24 |  16  8 |  * 10

o3o3/2o3/2x4/3x

. .   .   .   . | 160 |   4  1 |   6  4 |   4  6 |  1  4
----------------+-----+--------+--------+--------+------
. .   .   x   . |   2 | 320  * |   3  1 |   3  3 |  1  3
. .   .   .   x |   2 |   * 80    0  4 |   0  6 |  0  4
----------------+-----+--------+--------+--------+------
. .   o3/2x   . |   3 |   3  0 | 320  * |   2  1 |  1  2
. .   .   x4/3x |   8 |   4  4 |   * 80 |   0  3 |  0  3
----------------+-----+--------+--------+--------+------
. o3/2o3/2x   .    4 |   6  0 |   4  0 | 160  * |  1  1
. .   o3/2x4/3x   24 |  24 12 |   8  6 |   * 40 |  0  2
----------------+-----+--------+--------+--------+------
o3o3/2o3/2x   .    5 |  10  0 |  10  0 |   5  0 | 32  *
. o3/2o3/2x4/3x   64 |  96 32 |  64 24 |  16  8 |  * 10

o3/2o3o3x4/3x

.   . . .   . | 160 |   4  1 |   6  4 |   4  6 |  1  4
--------------+-----+--------+--------+--------+------
.   . . x   . |   2 | 320  * |   3  1 |   3  3 |  1  3
.   . . .   x |   2 |   * 80    0  4 |   0  6 |  0  4
--------------+-----+--------+--------+--------+------
.   . o3x   . |   3 |   3  0 | 320  * |   2  1 |  1  2
.   . . x4/3x |   8 |   4  4 |   * 80 |   0  3 |  0  3
--------------+-----+--------+--------+--------+------
.   o3o3x   .    4 |   6  0 |   4  0 | 160  * |  1  1
.   . o3x4/3x   24 |  24 12 |   8  6 |   * 40 |  0  2
--------------+-----+--------+--------+--------+------
o3/2o3o3x   .    5 |  10  0 |  10  0 |   5  0 | 32  *
.   o3o3x4/3x   64 |  96 32 |  64 24 |  16  8 |  * 10

o3/2o3o3/2x4/3x

.   . .   .   . | 160 |   4  1 |   6  4 |   4  6 |  1  4
----------------+-----+--------+--------+--------+------
.   . .   x   . |   2 | 320  * |   3  1 |   3  3 |  1  3
.   . .   .   x |   2 |   * 80    0  4 |   0  6 |  0  4
----------------+-----+--------+--------+--------+------
.   . o3/2x   . |   3 |   3  0 | 320  * |   2  1 |  1  2
.   . .   x4/3x |   8 |   4  4 |   * 80 |   0  3 |  0  3
----------------+-----+--------+--------+--------+------
.   o3o3/2x   .    4 |   6  0 |   4  0 | 160  * |  1  1
.   . o3/2x4/3x   24 |  24 12 |   8  6 |   * 40 |  0  2
----------------+-----+--------+--------+--------+------
o3/2o3o3/2x   .    5 |  10  0 |  10  0 |   5  0 | 32  *
.   o3o3/2x4/3x   64 |  96 32 |  64 24 |  16  8 |  * 10

o3/2o3/2o3x4/3x

.   .   . .   . | 160 |   4  1 |   6  4 |   4  6 |  1  4
----------------+-----+--------+--------+--------+------
.   .   . x   . |   2 | 320  * |   3  1 |   3  3 |  1  3
.   .   . .   x |   2 |   * 80    0  4 |   0  6 |  0  4
----------------+-----+--------+--------+--------+------
.   .   o3x   . |   3 |   3  0 | 320  * |   2  1 |  1  2
.   .   . x4/3x |   8 |   4  4 |   * 80 |   0  3 |  0  3
----------------+-----+--------+--------+--------+------
.   o3/2o3x   .    4 |   6  0 |   4  0 | 160  * |  1  1
.   .   o3x4/3x   24 |  24 12 |   8  6 |   * 40 |  0  2
----------------+-----+--------+--------+--------+------
o3/2o3/2o3x   .    5 |  10  0 |  10  0 |   5  0 | 32  *
.   o3/2o3x4/3x   64 |  96 32 |  64 24 |  16  8 |  * 10

o3/2o3/2o3/2x4/3x

.   .   .   .   . | 160 |   4  1 |   6  4 |   4  6 |  1  4
------------------+-----+--------+--------+--------+------
.   .   .   x   . |   2 | 320  * |   3  1 |   3  3 |  1  3
.   .   .   .   x |   2 |   * 80    0  4 |   0  6 |  0  4
------------------+-----+--------+--------+--------+------
.   .   o3/2x   . |   3 |   3  0 | 320  * |   2  1 |  1  2
.   .   .   x4/3x |   8 |   4  4 |   * 80 |   0  3 |  0  3
------------------+-----+--------+--------+--------+------
.   o3/2o3/2x   .    4 |   6  0 |   4  0 | 160  * |  1  1
.   .   o3/2x4/3x   24 |  24 12 |   8  6 |   * 40 |  0  2
------------------+-----+--------+--------+--------+------
o3/2o3/2o3/2x   .    5 |  10  0 |  10  0 |   5  0 | 32  *
.   o3/2o3/2x4/3x   64 |  96 32 |  64 24 |  16  8 |  * 10

© 2004-2025
top of page