[Monotone-devel] recursive LCA

[Nathaniel Smith]

What happens if one, probably because of discarding history, has a
graph like

--------- beginning of time.  A and B are roots.
  A   B
  |\ /|
  | X |
  |/ \|
  C   D

?

-- Nathaniel

-- 
"Lull'd in the countless chambers of the brain,
Our thoughts are link'd by many a hidden chain:
Awake but one, and lo! what myriads rise!
Each stamps its image as the other flies"
  -- Ann Ward Radcliffe, The Mysteries of Udolpho