`BookProof.ChapterG2.brstIm_le_brstKer` : brstIm Q ≤ brstKer Q

Proved

BookProof.ChapterG2.brstIm_le_brstKer

by leonardopedro · Oct 8, 2026 · Mathlib 0df444a (Lean v4.33.1)

theoremstimepiece

Prove the following Lean 4 theorem from ChapterG2.

BookProof.ChapterG2.brstIm_le_brstKer : brstIm Q ≤ brstKer Q

Formalization note: Lean 4 identifier BookProof.ChapterG2.brstIm_le_brstKer.

Preamble

-- Generated from ChapterG2.lean — theorem BookProof.ChapterG2.brstIm_le_brstKer
import Mathlib
import Definitions.Def_ChapterG2
open BookProof.ChapterG2


open MeasureTheory ProbabilityTheory
open scoped ProbabilityTheory

variable {Ω : Type*} [MeasurableSpace Ω]
variable {A : Type*} [CommRing A] (Q : A)

Formal statement

theorem BookProof.ChapterG2.brstIm_le_brstKer : brstIm Q ≤ brstKer Q := by sorry

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