Theorem SimpleGraph.IsTree.ncard_edgeSet_add_one

Modification history

2026-10-17 16:48

Mathlib/Combinatorics/SimpleGraph/Acyclic.lean

feat(Combinatorics/SimpleGraph/Acyclic): a graph is a tree iff it's acyclic and has exactly `n - 1` edges (#34910)

Added SimpleGraph.IsTree.ncard_edgeSet_add_one View on Github →