Theorems · Theorem · global analysis

ModelWithCorners.boundary_open

∀ {𝕜 : Type u_1} [inst : NontriviallyNormedField 𝕜] {E : Type u_2} [inst_1 : NormedAddCommGroup E]
  [inst_2 : NormedSpace 𝕜 E] {H : Type u_3} [inst_3 : TopologicalSpace H] {I : ModelWithCorners 𝕜 E H} {M : Type u_4}
  [inst_4 : TopologicalSpace M] [inst_5 : ChartedSpace H M] {u : TopologicalSpace.Opens M},
  ModelWithCorners.boundary ↥u = Subtype.val ⁻¹' ModelWithCorners.boundary M

The boundary of u : Opens M is the preimage of the boundary of M under the inclusion.

Defined in

Mathlib.Geometry.Manifold.IsManifold.InteriorBoundary

Cited by

0 results in Mathlib

Foundations

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

Assumes

NontriviallyNormedFieldNormedAddCommGroupNormedSpaceTopologicalSpaceTopologicalSpaceChartedSpace