trunk boundary exclusion

Proved

Freiman.trunk_boundary_exclusion

by tp · Sep 9, 2026 · Mathlib 0df444a (Lean v4.33.1)

algebracontinued-fractionsformalization

The two residual closed-boundary rows are discharged by the original H11/H0 factor and the explicit actual source-bound evaluation at the only possible corner.

Preamble

import Definitions.Def_Freiman_trunkGeometry
import Mathlib.Tactic.FinCases
import Mathlib.Tactic.Linarith

open Freiman

Formal statement

theorem Freiman.trunk_boundary_exclusion (R : CertRectangle) (bs : List CertBound) (hb : trunkBoundaryBound R bs)
    (r s q : ℝ) (hm : certRectangleMem R r s) :
    ¬ trunkHolds bs r s q := by
  sorry

Source

Report Proposition4.1 s15:trunk, printed report p28; original source pp120–126. Complete sixteen-state trunk certificate,58230 records,90 case plans, with three explicitly unfilled interfaces.

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