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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.