Freiman marked initial bridges: survivor extract

Proved

Freiman.lower_bridge_survivor_extract

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

certificatesfreimanlower-construction

Extract the actual S width decision and two survivor cuts from the first three rows of each finite catalog.

Preamble

import Definitions.Def_Freiman_lowerBridgeCatalog
import Mathlib.Tactic.Linarith
import Mathlib.Tactic.Push

open Freiman

Formal statement

theorem Freiman.lower_bridge_survivor_extract (c : LowerBridgeCase) (n k : ℕ) (hc : lowerBridgeZero c = decide (n=0)) (h : lowerBridgeFacts c n k) : lowerBridgeSurvivorLarge c n k := by
  sorry

Source

Freiman report, initial_bridges.tex, corrected marked H entries; H_entry_bridges.json 185 exact polynomial records.

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