trunk endpoint strict equal
OpenFreiman.trunk_endpoint_strict_equalalgebracontinued-fractionsformalization
For equal whole-word parity, the four natural/shortened endpoint tails lie in strictly ordered separated ranges; finite positive-digit prefix maps give strict actual endpoint order, including every auxiliary-width tie.
Preamble
import Definitions.Def_Freiman_trunkGeometry import Mathlib.Tactic.FinCases import Mathlib.Tactic.Linarith open Freiman
Formal statement
theorem Freiman.trunk_endpoint_strict_equal (p : LowerPair) (hp : p.1.length % 2 = p.2.length % 2) :
lowerEndpoint p false < lowerEndpoint p true := by
sorrySource
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.