Theorems · Theorem · algebraic topology

Topology.RelCWComplex.nonempty_cellFrontier

∀ {X : Type u_1} [t : TopologicalSpace X] {C : Set X} [inst : Topology.CWComplex C] {n : ℕ},
  n ≠ 0 → ∀ (j : Topology.RelCWComplex.cell C n), (Topology.RelCWComplex.cellFrontier n j).Nonempty

Defined in

Mathlib.Topology.CWComplex.Classical.Basic

Cited by

1 results in Mathlib

Foundations

Depth 157 from the axioms · uses propext, Classical.choice, Quot.sound

Assumes

TopologicalSpaceTopology.CWComplex