The Lean 4 theorem `esgn_eq` in the `ChapterNavierStokesSignFlip` chapter of the timepiece formalization
ProvedBookProof.NavierStokesFlow.SignFlip.esgn_eq_inctimepiece
The Lean 4 theorem esgn_eq in the ChapterNavierStokesSignFlip chapter of the timepiece formalization.
Replaces the unuploadable node BookProof_NavierStokesFlow_SignFlip_esgn_eq, whose statement name is already declared inside its published definition bundle; the _inc suffix publishes the same statement as its own node.
Preamble
-- Generated from ChapterNavierStokesSignFlip.lean — theorem BookProof.NavierStokesFlow.SignFlip.esgn_eq_inc
import Mathlib
import Definitions.Def_ChapterNavierStokesSignFlip
import Definitions.Def_ChapterNavierStokesAffineFiberEsa
open BookProof.NavierStokesFlow
open BookProof.NavierStokesFlow.SignFlip
open scoped ENNReal
open LpNat BookProof.FarisLavine IkebeKato HermiteFarisLavine ShiftHamiltonian AffineFiber
variable {F : Type*} [NormedAddCommGroup F] [InnerProductSpace ℂ F] {D : Submodule ℂ F}
variable {ι : Type*}Formal statement
theorem BookProof.NavierStokesFlow.SignFlip.esgn_eq_inc (c : ℝ) : esgn c = 1 ∨ esgn c = -1 := by sorry
Source