(X Y : ι → ℂ) (β : ι) : ‖S.crossA X Y β‖ ≤ S.maj.ampSeq X β * ‖Y (S.shift β)‖

-- Generated from ChapterNavierStokesSignedShift.lean — theorem BookProof.NavierStokesFlow.SignedShift.SignedHop.norm_crossA_le
import Mathlib
import Definitions.Def_ChapterNavierStokesSignedShift
open BookProof.NavierStokesFlow
open BookProof.NavierStokesFlow.SignedShift
open BookProof.NavierStokesFlow.SignedShift.SignedHop









open scoped ENNReal




variable {ι : Type*}



variable {sym : ι → ℝ} (S : SignedHop ι sym)

theorem BookProof.NavierStokesFlow.SignedShift.SignedHop.norm_crossA_le (X Y : ι → ℂ) (β : ι) :
    ‖S.crossA X Y β‖ ≤ S.maj.ampSeq X β * ‖Y (S.shift β)‖ := by sorry