Acronym sipthi
Name small prismatotriakishecatonicosachoron
Colonel of regiment (is itself locally convex – uniform polychoral members:
 by cells: dip gaddid qrid quitdid tigid trip paqrigafix 720 0 120 0 120 1200 sipthi 0 120 0 120 120 1200
& others)
External

As abstract polytope sipthi is isomorphic to gipthi, thereby interchanging the roles of decagons and decagrams and replacing the pentagrams by pentagons, respectively replacing tigid by quit sissid and gaddid by saddid.

Incidence matrix according to Dynkin symbol

```x5x5/2o3x5/3*b

. .   . .      | 7200 |    1    2    2 |    2    2    1    2    1 |   1   2    1   1
---------------+------+----------------+--------------------------+-----------------
x .   . .      |    2 | 3600    *    * |    2    2    0    0    0 |   1   2    1   0
. x   . .      |    2 |    * 7200    * |    1    0    1    1    0 |   1   1    0   1
. .   . x      |    2 |    *    * 7200 |    0    1    0    1    1 |   0   1    1   1
---------------+------+----------------+--------------------------+-----------------
x5x   . .      |   10 |    5    5    0 | 1440    *    *    *    * |   1   1    0   0
x .   . x      |    4 |    2    0    2 |    * 3600    *    *    * |   0   1    1   0
. x5/2o .      |    5 |    0    5    0 |    *    * 1440    *    * |   1   0    0   1
. x   . x5/3*b |   10 |    0    5    5 |    *    *    * 1440    * |   0   1    0   1
. .   o3x      |    3 |    0    0    3 |    *    *    *    * 2400 |   0   0    1   1
---------------+------+----------------+--------------------------+-----------------
x5x5/2o .      ♦   60 |   30   60    0 |   12    0   12    0    0 | 120   *    *   *
x5x   . x5/3*b ♦  120 |   60   60   60 |   12   30    0   12    0 |   * 120    *   *
x .   o3x      ♦    6 |    3    0    6 |    0    3    0    0    2 |   *   * 1200   *
. x5/2o3x5/3*b ♦   60 |    0   60   60 |    0    0   12   12   20 |   *   *    * 120
```

```x5x5/3o3/2x5/3*b

. .   .   .      | 7200 |    1    2    2 |    2    2    1    2    1 |   1   2    1   1
-----------------+------+----------------+--------------------------+-----------------
x .   .   .      |    2 | 3600    *    * |    2    2    0    0    0 |   1   2    1   0
. x   .   .      |    2 |    * 7200    * |    1    0    1    1    0 |   1   1    0   1
. .   .   x      |    2 |    *    * 7200 |    0    1    0    1    1 |   0   1    1   1
-----------------+------+----------------+--------------------------+-----------------
x5x   .   .      |   10 |    5    5    0 | 1440    *    *    *    * |   1   1    0   0
x .   .   x      |    4 |    2    0    2 |    * 3600    *    *    * |   0   1    1   0
. x5/3o   .      |    5 |    0    5    0 |    *    * 1440    *    * |   1   0    0   1
. x   .   x5/3*b |   10 |    0    5    5 |    *    *    * 1440    * |   0   1    0   1
. .   o3/2x      |    3 |    0    0    3 |    *    *    *    * 2400 |   0   0    1   1
-----------------+------+----------------+--------------------------+-----------------
x5x5/3o   .      ♦   60 |   30   60    0 |   12    0   12    0    0 | 120   *    *   *
x5x   .   x5/3*b ♦  120 |   60   60   60 |   12   30    0   12    0 |   * 120    *   *
x .   o3/2x      ♦    6 |    3    0    6 |    0    3    0    0    2 |   *   * 1200   *
. x5/3o3/2x5/3*b ♦   60 |    0   60   60 |    0    0   12   12   20 |   *   *    * 120
```