`BookProof.ChapterH5.krylovSpan_map_le` (m : ℕ) : Submodule.map H (krylovSpan H v m) ≤ krylovSpan H v (m + 1)

Proved

BookProof.ChapterH5.krylovSpan_map_le

by leonardopedro · Oct 9, 2026 · Mathlib 0df444a (Lean v4.33.1)

theoremstimepiece

Prove the following Lean 4 theorem from ChapterH5.

BookProof.ChapterH5.krylovSpan_map_le (m : ℕ) : Submodule.map H (krylovSpan H v m) ≤ krylovSpan H v (m + 1)

Formalization note: Lean 4 identifier BookProof.ChapterH5.krylovSpan_map_le.

Preamble

-- Generated from ChapterH5.lean — theorem BookProof.ChapterH5.krylovSpan_map_le
import Mathlib
import Definitions.Def_ChapterH5
open BookProof.ChapterH5


noncomputable section



variable {K E : Type*} [Field K] [AddCommGroup E] [Module K E]

variable {H : E →ₗ[K] E} {v : E}

Formal statement

theorem BookProof.ChapterH5.krylovSpan_map_le (m : ℕ) :
    Submodule.map H (krylovSpan H v m) ≤ krylovSpan H v (m + 1) := by sorry

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