Acronym ...
Name 2deca (?)
Circumradius sqrt(2) = 1.414214
General of army deca
Colonel of regiment deca
Confer
non-Grünbaumian master:
deca  

Looks like a compound of 2 decachora (deca), and indeed all but the Grünbaumian elements coincide by pairs.


Incidence matrix according to Dynkin symbol

β3x3x3o

both( . . . . ) | 60 |  1  2  1 |  2  1  1  2 | 1 2 1
----------------+----+----------+-------------+------
both( . x . . ) |  2 | 30  *  * |  2  0  1  0 | 1 2 0
both( . . x . ) |  2 |  * 60  * |  1  1  0  1 | 1 1 1
sefa( β3x . . ) |  2 |  *  * 30 |  0  0  1  2 | 0 2 1
----------------+----+----------+-------------+------
both( . x3x . ) |  6 |  3  3  0 | 20  *  *  * | 1 1 0
both( . . x3o ) |  3 |  0  3  0 |  * 20  *  * | 1 0 1
      β3x . .     6 |  3  0  3 |  *  * 10  * | 0 2 0
sefa( β3x3x . ) |  6 |  0  3  3 |  *  *  * 20 | 0 1 1
----------------+----+----------+-------------+------
both( . x3x3o )  12 |  6 12  0 |  4  4  0  0 | 5 * *
      β3x3x .    24 | 12 12 12 |  4  0  4  4 | * 5 *
sefa( β3x3x3o )  12 |  0 12  6 |  0  4  0  4 | * * 5

starting figure: x3x3x3o

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