fact: Definition max_var_nformulae (l : list (NFormula Z)) := List.fold_left (fun acc f => Pos.max acc (max_var xH (fst f))) l xH.
imports: List Bool OrderedRing RingMicromega ZCoeff Refl ZArith_base ZArithRing Ztac EnvRing Coq.micromega.Tauto BinNums Zdiv Znumtheory QArith Znumtheory