Incidence matrix according to Dynkin symbol

xo5/2oo5oo ox&#x   → height = sqrt[(1+sqrt(5))/8] = 0.636010
(pyramid product of line with sissid)

o.5/2o.5o. o.    | 12 * |  5  2 0 |  5 10  1 | 1 10  5 | 2  5
.o5/2.o5.o .o    |  * 2 |  0 12 1 |  0 30 12 | 0 12 30 | 1 12
-----------------+------+---------+----------+---------+-----
x.   .. .. ..    |  2 0 | 30  * * |  2  2  0 | 1  4  1 | 2  2
oo5/2oo5oo oo&#x |  1 1 |  * 24 * |  0  5  1 | 0  5  5 | 1  5
..   .. .. .x    |  0 2 |  *  * 1 |  0  0 12 | 0  0 30 | 0 12
-----------------+------+---------+----------+---------+-----
x.5/2o. .. ..    |  5 0 |  5  0 0 | 12  *  * | 1  2  0 | 2  1  {5/2}
xo   .. .. ..&#x |  2 1 |  1  2 0 |  * 60  * | 0  2  1 | 1  2
..   .. .. ox&#x |  1 2 |  0  2 1 |  *  * 12 | 0  0  5 | 0  5
-----------------+------+---------+----------+---------+-----
x.5/2o.5o. ..    ♦ 12 0 | 30  0 0 | 12  0  0 | 1  *  * | 2  0
xo5/2oo .. ..&#x ♦  5 1 |  5  5 0 |  1  5  0 | * 24  * | 1  1
xo   .. .. ox&#x ♦  2 2 |  1  4 1 |  0  2  2 | *  * 30 | 0  2
-----------------+------+---------+----------+---------+-----
xo5/2oo5oo ..&#x ♦ 12 1 | 30 12 0 | 12 30  0 | 1 12  0 | 2  *
xo5/2oo .. ox&#x ♦  5 2 |  5 10 1 |  1 10  5 | 0  2  5 | * 12