Theorems · Theorem · algebraic topology

Topology.CWComplex.cellFrontier_subset_finite_closedCell

∀ {X : Type u_1} [t : TopologicalSpace X] {C : Set X} [inst : Topology.CWComplex C] (n : ℕ)
  (i : Topology.RelCWComplex.cell C n),
  ∃ I, Topology.RelCWComplex.cellFrontier n i ⊆ ⋃ m, ⋃ (_ : m < n), ⋃ j ∈ I m, Topology.RelCWComplex.closedCell m j

Defined in: Mathlib.Topology.CWComplex.Classical.Basic
Cited by: 1 results in Mathlib
Foundations: Depth 156 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: TopologicalSpace Topology.CWComplex

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Cited by1

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Topology.CWComplex.exists_cellFrontier_one_eqproof · cited by 1