AddSubgroup.isOpen_of_zero_mem_interior

∀ {G : Type u_1} [inst : AddGroup G] [inst_1 : TopologicalSpace G] [SeparatelyContinuousAdd G] (H : AddSubgroup G),
  0 ∈ interior ↑H → IsOpen ↑H

If a subgroup of an additive topological group has 0 in its interior, then it is open.

Defined in: Mathlib.Topology.Algebra.OpenSubgroup
Cited by: 0 results in Mathlib
Foundations: Depth 68 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: AddGroup TopologicalSpace SeparatelyContinuousAdd

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