Incidence matrix according to Dynkin symbol
x xno xko (n>2, k>2)
. . . . . | 2nk | 1 2 2 | 2 2 1 4 1 | 1 4 1 2 2 | 2 2 1
----------+-----+------------+-----------------+--------------+------
x . . . . | 2 | nk * * | 2 2 0 0 0 | 1 4 1 0 0 | 2 2 0
. x . . . | 2 | * 2nk * | 1 0 1 2 0 | 1 2 0 2 1 | 2 1 1
. . . x . | 2 | * * 2nk | 0 1 0 2 1 | 0 2 1 1 2 | 1 2 1
----------+-----+------------+-----------------+--------------+------
x x . . . | 4 | 2 2 0 | nk * * * * | 1 2 0 0 0 | 2 1 0
x . . x . | 4 | 2 0 2 | * nk * * * | 0 2 1 0 0 | 1 2 0
. xno . . | n | 0 n 0 | * * 2k * * | 1 0 0 2 0 | 2 0 1
. x . x . | 4 | 0 2 2 | * * * 2nk * | 0 1 0 1 1 | 1 1 1
. . . xko | k | 0 0 k | * * * * 2n | 0 0 1 0 2 | 0 2 1
----------+-----+------------+-----------------+--------------+------
x xno . . ♦ 2n | n 2n 0 | n 0 2 0 0 | k * * * * | 2 0 0
x x . x . ♦ 8 | 4 4 4 | 2 2 0 2 0 | * nk * * * | 1 1 0
x . . xko ♦ 2k | k 0 2k | 0 k 0 0 2 | * * n * * | 0 2 0
. xno x . ♦ 2n | 0 2n n | 0 0 2 n 0 | * * * 2k * | 1 0 1
. x . xko ♦ 2k | 0 k 2k | 0 0 0 k 2 | * * * * 2n | 0 1 1
----------+-----+------------+-----------------+--------------+------
x xno x . ♦ 4n | 2n 4n 2n | 2n n 4 2n 0 | 2 n 0 2 0 | k * *
x x . xko ♦ 4k | 2k 2k 4k | k 2k 0 2k 4 | 0 k 2 0 2 | * n *
. xno xko ♦ nk | 0 nk nk | 0 0 k nk n | 0 0 0 k n | * * 2
xxnoo xxkoo&#x (n>2, k>2) → height = 1
({n}{k}-dip || {n}{k}-dip)
o.no. o.ko. | nk * | 2 2 1 0 0 | 1 4 1 2 2 0 0 0 | 2 2 1 4 1 0 0 | 1 2 2 0
.on.o .ok.o | * nk | 0 0 1 2 2 | 0 0 0 2 2 1 4 1 | 0 0 1 4 1 2 2 | 0 2 2 1
---------------+-------+----------------+---------------------+----------------+--------
x. .. .. .. | 2 0 | nk * * * * | 1 2 0 1 0 0 0 0 | 2 1 1 2 0 0 0 | 1 2 1 0
.. .. x. .. | 2 0 | * nk * * * | 0 2 1 0 1 0 0 0 | 1 2 0 2 1 0 0 | 1 1 2 0
oonoo ookoo&#x | 1 1 | * * nk * * | 0 0 0 2 2 0 0 0 | 0 0 1 4 1 0 0 | 0 2 2 0
.x .. .. .. | 0 2 | * * * nk * | 0 0 0 1 0 1 2 0 | 0 0 1 2 0 2 1 | 0 2 1 1
.. .. .x .. | 0 2 | * * * * nk | 0 0 0 0 1 0 2 1 | 0 0 0 2 1 1 2 | 0 1 2 1
---------------+-------+----------------+---------------------+----------------+--------
x.no. .. .. | n 0 | n 0 0 0 0 | k * * * * * * * | 2 0 1 0 0 0 0 | 1 2 0 0
x. .. x. .. | 4 0 | 2 2 0 0 0 | * nk * * * * * * | 1 1 0 1 0 0 0 | 1 1 1 0
.. .. x.ko. | k 0 | 0 k 0 0 0 | * * n * * * * * | 0 2 0 0 1 0 0 | 1 0 2 0
xx .. .. ..&#x | 2 2 | 1 0 2 1 0 | * * * nk * * * * | 0 0 1 2 0 0 0 | 0 2 1 0
.. .. xx ..&#x | 2 2 | 0 1 2 0 1 | * * * * nk * * * | 0 0 0 2 1 0 0 | 0 1 2 0
.xn.o .. .. | 0 n | 0 0 0 n 0 | * * * * * k * * | 0 0 1 0 0 2 0 | 0 2 0 1
.x .. .x .. | 0 4 | 0 0 0 2 2 | * * * * * * nk * | 0 0 0 1 0 1 1 | 0 1 1 1
.. .. .xk.o | 0 k | 0 0 0 0 k | * * * * * * * n | 0 0 0 0 1 0 2 | 0 0 2 1
---------------+-------+----------------+---------------------+----------------+--------
x.no. x. .. ♦ 2n 0 | 2n n 0 0 0 | 2 n 0 0 0 0 0 0 | k * * * * * * | 1 1 0 0
x. .. x.ko. ♦ 2k 0 | k 2k 0 0 0 | 0 k 2 0 0 0 0 0 | * n * * * * * | 1 0 1 0
xxnoo .. ..&#x ♦ n n | n 0 n n 0 | 1 0 0 n 0 1 0 0 | * * k * * * * | 0 2 0 0
xx .. xx ..&#x ♦ 4 4 | 2 2 4 2 2 | 0 1 0 2 2 0 1 0 | * * * nk * * * | 0 1 1 0
.. .. xxkoo&#x ♦ k k | 0 k k 0 k | 0 0 1 0 k 0 0 1 | * * * * n * * | 0 0 2 0
.xn.o .x .. ♦ 0 2n | 0 0 0 2n n | 0 0 0 0 0 2 n 0 | * * * * * k * | 0 1 0 1
.x .. .xk.o ♦ 0 2k | 0 0 0 k 2k | 0 0 0 0 0 0 k 2 | * * * * * * n | 0 0 1 1
---------------+-------+----------------+---------------------+----------------+--------
x.no. x.ko. ♦ nk 0 | nk nk 0 0 0 | k nk n 0 0 0 0 0 | k n 0 0 0 0 0 | 1 * * *
xxnoo xx ..&#x ♦ 2n 2n | 2n n 2n 2n n | 2 n 0 2n n 2 n 0 | 1 0 2 n 0 1 0 | * k * *
xx .. xxkoo&#x ♦ 2k 2k | k 2k 2k k 2k | 0 k 2 k 2k 0 k 2 | 0 1 0 k 2 0 1 | * * n *
.xn.o .xk.o ♦ 0 nk | 0 0 0 nk nk | 0 0 0 0 0 k nk n | 0 0 0 0 0 k n | * * * 1