Theorems · Theorem · functional analysis

ContinuousLinearMap.isOpenMap

• 1000+ list: Open mapping theorem (functional analysis)

∀ {𝕜 : Type u_1} {𝕜' : Type u_2} [inst : NontriviallyNormedField 𝕜] [inst_1 : NontriviallyNormedField 𝕜'] {σ : 𝕜 →+* 𝕜'}
  {E : Type u_3} [inst_2 : NormedAddCommGroup E] [inst_3 : NormedSpace 𝕜 E] {F : Type u_4}
  [inst_4 : NormedAddCommGroup F] [inst_5 : NormedSpace 𝕜' F] (f : E →SL[σ] F) {σ' : 𝕜' →+* 𝕜} [RingHomInvPair σ σ']
  [RingHomIsometric σ] [RingHomIsometric σ'] [CompleteSpace F] [CompleteSpace E], Function.Surjective ⇑f → IsOpenMap ⇑f

The Banach open mapping theorem: a surjective bounded linear map between Banach spaces is open.

Defined in

Mathlib.Analysis.Normed.Operator.Banach

Cited by

6 results in Mathlib

Foundations

Depth 169 from the axioms · uses propext, Classical.choice, Quot.sound

Assumes

NontriviallyNormedFieldNontriviallyNormedFieldNormedAddCommGroupNormedSpaceNormedAddCommGroupNormedSpaceRingHomInvPairRingHomIsometricRingHomIsometricCompleteSpaceCompleteSpace