⭳

Incidence matrix according to Dynkin symbol

(uo)o (ou)x&#(12:zq,13:h,23:q)   → height(12,3) = sqrt(7)/2 = 1.322876
(dual {4} || line)

(o.). (o.).                   | 2 * * | 2 2 0 0 | 1 2 1
(.o). (.o).                   | * 2 * | 2 0 1 0 | 1 2 0
(..)o (..)o                   | * * 2 | 0 2 1 1 | 0 2 2
------------------------------+-------+---------+------
(oo). (oo).&#q                | 1 1 0 | 4 * * * | 1 1 0  q
(o.)o (o.)o&#h                | 1 0 1 | * 4 * * | 0 1 1  h
(.o)o (.o)o&#q                | 0 1 1 | * * 2 * | 0 2 0  q
 .. .  .. x                   | 0 0 2 | * * * 1 | 0 0 2  x
------------------------------+-------+---------+------
(uo). (ou).&#(zq)             | 2 2 0 | 4 0 0 0 | 1 * *  q-{4}
(oo)o (oo)o&#(12:q,13:h,23:q) | 1 1 1 | 1 1 1 0 | * 4 *  {qqh}
 .. . (o.)x&#h                | 1 0 2 | 0 2 0 1 | * * 2  {xhh}