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src/HOLCF/FOCUS/FOCUS.ML
author huffman
Fri, 01 Jul 2005 04:00:23 +0200
changeset 16628 286e70f0d809
parent 15188 9d57263faf9e
child 17293 ecf182ccc3ca
permissions -rw-r--r--
remove uses of sign_of

(*  Title: 	HOLCF/FOCUS/FOCUS.ML
    ID:         $Id$
    Author: 	David von Oheimb, TU Muenchen
*)

val ex_eqI = prove_goal thy "? xx. x = xx" (K [Auto_tac]);
val ex2_eqI = prove_goal thy "? xx yy. x = xx & y = yy" (K [Auto_tac]);
val eq_UU_symf = prove_goal thy "(UU = f x) = (f x = UU)" (K [Auto_tac]);

AddSIs [ex_eqI, ex2_eqI];
Addsimps[eq_UU_symf];
Goal "(#x ~= 0) = (? a y. x = a~> y)";
by (simp_tac (simpset() addsimps [thm "slen_empty_eq", fstream_exhaust_eq]) 1);
qed "fstream_exhaust_slen_eq";

Addsimps[thm "slen_less_1_eq", fstream_exhaust_slen_eq,
		   thm "slen_fscons_eq", thm "slen_fscons_less_eq"];
Addsimps[thm "Suc_ile_eq"];
AddEs  [strictI];
isabelle