`BookProof.DirectSumEdge.dsOp_edge_of_fibre_edges` (H : ∀ i, D i →ₗ[ℂ] G i) (nu : ℝ) (hedge : ∀ i (u : D i), nu * ‖(u : G i)‖ ^ 2 ≤ quadForm (H i) u) (x : dsCore D) : nu * ‖(x : lp

Proved

BookProof.DirectSumEdge.dsOp_edge_of_fibre_edges

by leonardopedro · Oct 7, 2026 · Mathlib 0df444a (Lean v4.33.1)

theoremstimepiece

Prove the following Lean 4 theorem from ChapterDirectSumEdge.

BookProof.DirectSumEdge.dsOp_edge_of_fibre_edges (H : ∀ i, D i →ₗ[ℂ] G i) (nu : ℝ) (hedge : ∀ i (u : D i), nu * ‖(u : G i)‖ ^ 2 ≤ quadForm (H i) u) (x : dsCore D) : nu * ‖(x : lp G 2)‖ ^ 2 ≤ quadForm (dsOp H) x

Formalization note: Lean 4 identifier BookProof.DirectSumEdge.dsOp_edge_of_fibre_edges.

Preamble

-- Generated from ChapterDirectSumEdge.lean — theorem BookProof.DirectSumEdge.dsOp_edge_of_fibre_edges
import Definitions.Def_ChapterFarisLavine
import Mathlib
import Definitions.Def_ChapterDirectSumEdge
import Definitions.Def_ChapterDirectSumEsa
import Definitions.Def_ChapterFarisLavineCore
open BookProof.DirectSumEsa
open BookProof.DirectSumEdge



open BookProof.FarisLavine BookProof.DirectSumEsa

noncomputable section

variable {ι : Type*} {G : ι → Type*} [∀ i, NormedAddCommGroup (G i)]
  [∀ i, InnerProductSpace ℂ (G i)] {D : ∀ i, Submodule ℂ (G i)}

Formal statement

theorem BookProof.DirectSumEdge.dsOp_edge_of_fibre_edges (H : ∀ i, D i →ₗ[ℂ] G i) (nu : ℝ)
    (hedge : ∀ i (u : D i), nu * ‖(u : G i)‖ ^ 2 ≤ quadForm (H i) u) (x : dsCore D) :
    nu * ‖(x : lp G 2)‖ ^ 2 ≤ quadForm (dsOp H) x := by sorry

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