CookLevin.isFormulaStringB_machine_unary_child

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by Rizwan · Sep 21, 2026 · Mathlib 0df444a (Lean v4.33.1)

Child lemma for CookLevin.isFormulaStringB_machine_unary

Formal statement

import Definitions.Def_CookLevin_Verifier

open CookLevin

theorem CookLevin.isFormulaStringB_machine_unary_child :
    ∃ (M : Machine) (k G : Nat) (c0 : Nat),
      TuringMachine k G M ∧
      ∀ x w : List Bool,
        DecidesIn M k (boolsToSymbols x) (boolsToSymbols w)
          (c0 * (x.length + 1) ^ 2)
          (isFormulaStringB x) := by sorry

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