Theorems · Theorem · functional analysis

LinearEquiv.extend_eq

∀ {𝕜 : Type u_1} {𝕜₂ : Type u_2} {E : Type u_3} {Eₗ : Type u_4} {F : Type u_5} {Fₗ : Type u_6}
  [inst : NormedDivisionRing 𝕜] [inst_1 : NormedDivisionRing 𝕜₂] [inst_2 : AddCommGroup E]
  [inst_3 : NormedAddCommGroup Eₗ] [inst_4 : AddCommGroup F] [inst_5 : NormedAddCommGroup Fₗ] [inst_6 : Module 𝕜 E]
  [inst_7 : Module 𝕜 Eₗ] [inst_8 : IsBoundedSMul 𝕜 Eₗ] [inst_9 : Module 𝕜₂ F] [inst_10 : Module 𝕜₂ Fₗ]
  [inst_11 : IsBoundedSMul 𝕜₂ Fₗ] [inst_12 : CompleteSpace Eₗ] [inst_13 : CompleteSpace Fₗ] {σ₁₂ : 𝕜 →+* 𝕜₂}
  {σ₂₁ : 𝕜₂ →+* 𝕜} [inst_14 : RingHomInvPair σ₁₂ σ₂₁] [inst_15 : RingHomInvPair σ₂₁ σ₁₂] (f : E ≃ₛₗ[σ₁₂] F)
  (e₁ : E →ₗ[𝕜] Eₗ) (e₂ : F →ₗ[𝕜₂] Fₗ) (h_dense₁ : DenseRange ⇑e₁) (h_norm₁ : ∃ C, ∀ (x : E), ‖e₂ (f x)‖ ≤ C * ‖e₁ x‖)
  (h_dense₂ : DenseRange ⇑e₂) (h_norm₂ : ∃ C, ∀ (x : F), ‖e₁ (f.symm x)‖ ≤ C * ‖e₂ x‖) (x : E),
  (f.extend e₁ e₂ h_dense₁ h_norm₁ h_dense₂ h_norm₂) (e₁ x) = e₂ (f x)

Defined in

Mathlib.Analysis.Normed.Operator.Extend

Cited by

0 results in Mathlib

Foundations

Depth 168 from the axioms · uses propext, Classical.choice, Quot.sound

Assumes

NormedDivisionRingNormedDivisionRingAddCommGroupNormedAddCommGroupAddCommGroupNormedAddCommGroupModuleModuleIsBoundedSMulModuleModuleIsBoundedSMulCompleteSpaceCompleteSpaceRingHomInvPairRingHomInvPair