Acronym tasa
Name truncated hepteract
Circumradius sqrt[19+12 sqrt(2)]/2 = 2.998773
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Incidence matrix according to Dynkin symbol

o3o3o3o3o3x4x

. . . . . . . | 896 |    6   1 |   15   6 |   20  15 |   15  20 |   6 15 |   1  6
--------------+-----+----------+----------+----------+----------+--------+-------
. . . . . x . |   2 | 2688   * |    5   1 |   10   5 |   10  10 |   5 10 |   1  5
. . . . . . x |   2 |    * 448     0   6 |    0  15 |    0  20 |   0 15 |   0  6
--------------+-----+----------+----------+----------+----------+--------+-------
. . . . o3x . |   3 |    3   0 | 4480   * |    4   1 |    6   4 |   4  6 |   1  4
. . . . . x4x |   8 |    4   4 |    * 672     0   5 |    0  10 |   0 10 |   0  5
--------------+-----+----------+----------+----------+----------+--------+-------
. . . o3o3x .    4 |    6   0 |    4   0 | 4480   * |    3   1 |   3  3 |   1  3
. . . . o3x4x   24 |   24  12 |    8   6 |    * 560     0   4 |   0  6 |   0  4
--------------+-----+----------+----------+----------+----------+--------+-------
. . o3o3o3x .    5 |   10   0 |   10   0 |    5   0 | 2688   * |   2  1 |   1  2
. . . o3o3x4x   64 |   96  32 |   64  24 |   16   8 |    * 280 |   0  3 |   0  3
--------------+-----+----------+----------+----------+----------+--------+-------
. o3o3o3o3x .    6 |   15   0 |   20   0 |   15   0 |    6   0 | 896  * |   1  1
. . o3o3o3x4x  160 |  320  80 |  320  80 |  160  40 |   32  10 |   * 84 |   0  2
--------------+-----+----------+----------+----------+----------+--------+-------
o3o3o3o3o3x .    7 |   21   0 |   35   0 |   35   0 |   21   0 |   7  0 | 128  *
. o3o3o3o3x4x  384 |  960 192 | 1280 240 |  960 160 |  384  60 |  64 12 |   * 14

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