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src/Tools/Metis/src/Normalize.sig
author wenzelm
Wed, 20 Jun 2007 22:07:52 +0200
changeset 23442 028e39e5e8f3
child 23510 4521fead5609
permissions -rw-r--r--
The Metis prover (slightly modified version from Larry);

(* ========================================================================= *)
(* NORMALIZING FORMULAS                                                      *)
(* Copyright (c) 2001-2007 Joe Hurd, distributed under the GNU GPL version 2 *)
(* ========================================================================= *)

signature Normalize =
sig

(* ------------------------------------------------------------------------- *)
(* Negation normal form.                                                     *)
(* ------------------------------------------------------------------------- *)

val nnf : Formula.formula -> Formula.formula

(* ------------------------------------------------------------------------- *)
(* Conjunctive normal form.                                                  *)
(* ------------------------------------------------------------------------- *)

val cnf : Formula.formula -> Formula.formula list

end
isabelle