Incidence matrix according to Dynkin symbol

s3s3s∞*a   (N,M → ∞)

demi( . . .    ) | 3NM |   2   2   2 |  1  1  1   3
-----------------+-----+-------------+-------------
sefa( s3s .    ) |   2 | 3NM   *   * |  1  0  0   1
sefa( s . s∞*a ) |   2 |   * 3NM   * |  0  1  0   1
sefa( . s3s    ) |   2 |   *   * 3NM |  0  0  1   1
-----------------+-----+-------------+-------------
      s3s .      ♦   3 |   3   0   0 | NM  *  *   *
      s . s∞*a   ♦   M |   0   M   0 |  * 3N  *   *
      . s3s      ♦   3 |   0   0   3 |  *  * NM   *
sefa( s3s3s∞*a ) |   3 |   1   1   1 |  *  *  * 3NM

starting figure: x3x3x∞*a

s3s∞o   (N,M → ∞)

demi( . . . ) | 3NM |   4   2 |   2  1   3
--------------+-----+---------+-----------
sefa( s3s . ) |   2 | 6NM   * |   1  0   1
sefa( . s∞o ) |   2 |   * 3NM |   0  1   1
--------------+-----+---------+-----------
      s3s .   ♦   3 |   3   0 | 2NM  *   *
      . s∞o   ♦   M |   0   M |   * 3N   *
sefa( s3s∞o ) |   3 |   2   1 |   *  * 3NM

starting figure: x3x∞o