`BookProof.NonnegSemigroup.approxS_add` (hT : IsNonnegSelfAdjoint T) (n : ℕ) (s t : ℝ) : approxS hT n (s + t) = approxS hT n s * approxS hT n t

Proved

BookProof.NonnegSemigroup.approxS_add

by leonardopedro · Oct 25, 2026 · Mathlib 0df444a (Lean v4.33.1)

theoremstimepiece

Prove the following Lean 4 theorem from ChapterNonnegSemigroup.

BookProof.NonnegSemigroup.approxS_add (hT : IsNonnegSelfAdjoint T) (n : ℕ) (s t : ℝ) : approxS hT n (s + t) = approxS hT n s * approxS hT n t

Formalization note: Lean 4 identifier BookProof.NonnegSemigroup.approxS_add.

Preamble

-- Generated from ChapterNonnegSemigroup.lean — theorem BookProof.NonnegSemigroup.approxS_add
import Definitions.Def_ChapterClosureUniqueness
import Definitions.Def_ChapterPositiveSquareRootUnique
import Definitions.Def_ChapterNonnegResolvent
import Definitions.Def_ChapterNonnegUnitaryGroup
import Mathlib
import Definitions.Def_ChapterNonnegSemigroup



open BookProof.ClosureUniqueness
open BookProof.PositiveSquareRoot
open Filter Topology NormedSpace
open scoped InnerProductSpace

variable {F : Type*} [NormedAddCommGroup F] [InnerProductSpace ℂ F] [CompleteSpace F]

variable {T : Submodule ℂ (F × F)}

Formal statement

theorem BookProof.NonnegSemigroup.approxS_add (hT : IsNonnegSelfAdjoint T) (n : ℕ) (s t : ℝ) :
    approxS hT n (s + t) = approxS hT n s * approxS hT n t := by sorry

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