Lowest Common Ancestor

Algorithms for finding the lowest common ancestor of trees and DAGs.

all_pairs_lowest_common_ancestor(G[, pairs])	Compute the lowest common ancestor for pairs of nodes.
tree_all_pairs_lowest_common_ancestor(G[, ...])	Yield the lowest common ancestor for sets of pairs in a tree.
lowest_common_ancestor(G, node1, node2[, ...])	Compute the lowest common ancestor of the given pair of nodes.