src/HOLCF/Sprod2.ML
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(*  Title:      HOLCF/sprod2.ML
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    ID:         $Id$
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    Author:     Franz Regensburger
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    Copyright   1993 Technische Universitaet Muenchen
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Lemmas for sprod2.thy
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*)
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open Sprod2;
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(* ------------------------------------------------------------------------ *)
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(* access to less_sprod in class po                                         *)
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(* ------------------------------------------------------------------------ *)
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qed_goal "less_sprod3a" Sprod2.thy 
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        "p1=Ispair UU UU ==> p1 << p2"
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(fn prems =>
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        [
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        (cut_facts_tac prems 1),
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        (rtac (inst_sprod_po RS ssubst) 1),
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        (etac less_sprod1a 1)
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        ]);
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qed_goal "less_sprod3b" Sprod2.thy
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 "p1~=Ispair UU UU ==>\
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\       (p1<<p2) = (Isfst(p1)<<Isfst(p2) & Issnd(p1)<<Issnd(p2))" 
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(fn prems =>
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        [
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        (cut_facts_tac prems 1),
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        (rtac (inst_sprod_po RS ssubst) 1),
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        (etac less_sprod1b 1)
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        ]);
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qed_goal "less_sprod4b" Sprod2.thy 
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        "p << Ispair UU UU ==> p = Ispair UU UU"
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(fn prems =>
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        [
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        (cut_facts_tac prems 1),
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        (rtac less_sprod2b 1),
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        (etac (inst_sprod_po RS subst) 1)
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        ]);
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val less_sprod4a = (less_sprod4b RS defined_Ispair_rev);
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(* Ispair ?a ?b << Ispair UU UU ==> ?a = UU | ?b = UU *)
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qed_goal "less_sprod4c" Sprod2.thy
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 "[|Ispair xa ya << Ispair x y; xa~=UU; ya~=UU; x~=UU; y~=UU|] ==>\
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\               xa<<x & ya << y"
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(fn prems =>
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        [
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        (cut_facts_tac prems 1),
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        (rtac less_sprod2c 1),
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        (etac (inst_sprod_po RS subst) 1),
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        (REPEAT (atac 1))
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        ]);
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(* ------------------------------------------------------------------------ *)
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(* type sprod is pointed                                                    *)
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(* ------------------------------------------------------------------------ *)
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qed_goal "minimal_sprod" Sprod2.thy  "Ispair UU UU << p"
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(fn prems =>
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        [
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        (rtac less_sprod3a 1),
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        (rtac refl 1)
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        ]);
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(* ------------------------------------------------------------------------ *)
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(* Ispair is monotone in both arguments                                     *)
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(* ------------------------------------------------------------------------ *)
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qed_goalw "monofun_Ispair1" Sprod2.thy [monofun] "monofun(Ispair)"
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(fn prems =>
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        [
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        (strip_tac 1),
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        (rtac (less_fun RS iffD2) 1),
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        (strip_tac 1),
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        (res_inst_tac [("Q",
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        " Ispair y xa = Ispair UU UU")] (excluded_middle RS disjE) 1),
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        (res_inst_tac [("Q",
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        " Ispair x xa = Ispair UU UU")] (excluded_middle RS disjE) 1),
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        (rtac (less_sprod3b RS iffD2) 1),
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        (atac 1),
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        (rtac conjI 1),
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        (rtac (Isfst RS ssubst) 1),
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        (etac (strict_Ispair_rev RS conjunct1) 1),
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        (etac (strict_Ispair_rev RS conjunct2) 1),
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        (rtac (Isfst RS ssubst) 1),
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        (etac (strict_Ispair_rev RS conjunct1) 1),
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        (etac (strict_Ispair_rev RS conjunct2) 1),
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        (atac 1),
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        (rtac (Issnd RS ssubst) 1),
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        (etac (strict_Ispair_rev RS conjunct1) 1),
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        (etac (strict_Ispair_rev RS conjunct2) 1),
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        (rtac (Issnd RS ssubst) 1),
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        (etac (strict_Ispair_rev RS conjunct1) 1),
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        (etac (strict_Ispair_rev RS conjunct2) 1),
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        (rtac refl_less 1),
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        (etac less_sprod3a 1),
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        (res_inst_tac [("Q",
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        " Ispair x xa  = Ispair UU UU")] (excluded_middle RS disjE) 1),
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        (etac less_sprod3a 2),
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        (res_inst_tac [("P","Ispair y xa = Ispair UU UU")] notE 1),
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        (atac 2),
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        (rtac defined_Ispair 1),
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        (etac notUU_I 1),
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        (etac (strict_Ispair_rev RS  conjunct1) 1),
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        (etac (strict_Ispair_rev RS  conjunct2) 1)
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        ]);
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qed_goalw "monofun_Ispair2" Sprod2.thy [monofun] "monofun(Ispair(x))"
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(fn prems =>
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        [
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        (strip_tac 1),
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        (res_inst_tac [("Q",
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        " Ispair x y = Ispair UU UU")] (excluded_middle RS disjE) 1),
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        (res_inst_tac [("Q",
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        " Ispair x xa = Ispair UU UU")] (excluded_middle RS disjE) 1),
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        (rtac (less_sprod3b RS iffD2) 1),
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        (atac 1),
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        (rtac conjI 1),
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        (rtac (Isfst RS ssubst) 1),
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        (etac (strict_Ispair_rev RS conjunct1) 1),
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        (etac (strict_Ispair_rev RS conjunct2) 1),
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        (rtac (Isfst RS ssubst) 1),
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        (etac (strict_Ispair_rev RS conjunct1) 1),
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        (etac (strict_Ispair_rev RS conjunct2) 1),
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        (rtac refl_less 1),
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        (rtac (Issnd RS ssubst) 1),
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        (etac (strict_Ispair_rev RS conjunct1) 1),
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        (etac (strict_Ispair_rev RS conjunct2) 1),
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        (rtac (Issnd RS ssubst) 1),
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        (etac (strict_Ispair_rev RS conjunct1) 1),
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        (etac (strict_Ispair_rev RS conjunct2) 1),
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        (atac 1),
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        (etac less_sprod3a 1),
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        (res_inst_tac [("Q",
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        " Ispair x xa = Ispair UU UU")] (excluded_middle RS disjE) 1),
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        (etac less_sprod3a 2),
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        (res_inst_tac [("P","Ispair x y = Ispair UU UU")] notE 1),
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        (atac 2),
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        (rtac defined_Ispair 1),
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        (etac (strict_Ispair_rev RS  conjunct1) 1),
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        (etac notUU_I 1),
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        (etac (strict_Ispair_rev RS  conjunct2) 1)
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        ]);
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qed_goal " monofun_Ispair" Sprod2.thy 
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 "[|x1<<x2; y1<<y2|] ==> Ispair x1 y1 << Ispair x2 y2"
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(fn prems =>
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        [
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        (cut_facts_tac prems 1),
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        (rtac trans_less 1),
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        (rtac (monofun_Ispair1 RS monofunE RS spec RS spec RS mp RS 
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        (less_fun RS iffD1 RS spec)) 1),
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        (rtac (monofun_Ispair2 RS monofunE RS spec RS spec RS mp) 2),
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        (atac 1),
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        (atac 1)
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        ]);
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(* ------------------------------------------------------------------------ *)
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(* Isfst and Issnd are monotone                                             *)
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(* ------------------------------------------------------------------------ *)
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d0dc8d057929 added qed, qed_goal[w]
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qed_goalw " monofun_Isfst" Sprod2.thy [monofun] "monofun(Isfst)"
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(fn prems =>
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        [
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        (strip_tac 1),
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        (res_inst_tac [("p","x")] IsprodE 1),
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        (hyp_subst_tac 1),
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        (rtac trans_less 1),
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        (rtac minimal 2),
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        (rtac (strict_Isfst1 RS ssubst) 1),
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        (rtac refl_less 1),
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        (hyp_subst_tac 1),
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        (res_inst_tac [("p","y")] IsprodE 1),
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        (hyp_subst_tac 1),
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        (res_inst_tac [("t","Isfst(Ispair xa ya)")] subst 1),
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        (rtac refl_less 2),
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        (etac (less_sprod4b RS sym RS arg_cong) 1),
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        (hyp_subst_tac 1),
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        (rtac (Isfst RS ssubst) 1),
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        (atac 1),
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        (atac 1),
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        (rtac (Isfst RS ssubst) 1),
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        (atac 1),
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        (atac 1),
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        (etac (less_sprod4c RS  conjunct1) 1),
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        (REPEAT (atac 1))
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        ]);
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qed_goalw "monofun_Issnd" Sprod2.thy [monofun] "monofun(Issnd)"
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(fn prems =>
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        [
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        (strip_tac 1),
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        (res_inst_tac [("p","x")] IsprodE 1),
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        (hyp_subst_tac 1),
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        (rtac trans_less 1),
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        (rtac minimal 2),
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        (rtac (strict_Issnd1 RS ssubst) 1),
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        (rtac refl_less 1),
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        (hyp_subst_tac 1),
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        (res_inst_tac [("p","y")] IsprodE 1),
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        (hyp_subst_tac 1),
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        (res_inst_tac [("t","Issnd(Ispair xa ya)")] subst 1),
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        (rtac refl_less 2),
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        (etac (less_sprod4b RS sym RS arg_cong) 1),
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        (hyp_subst_tac 1),
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        (rtac (Issnd RS ssubst) 1),
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        (atac 1),
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        (atac 1),
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        (rtac (Issnd RS ssubst) 1),
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        (atac 1),
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        (atac 1),
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        (etac (less_sprod4c RS  conjunct2) 1),
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        (REPEAT (atac 1))
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        ]);
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(* ------------------------------------------------------------------------ *)
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(* the type 'a ** 'b is a cpo                                               *)
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(* ------------------------------------------------------------------------ *)
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qed_goal "lub_sprod" Sprod2.thy 
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"[|is_chain(S)|] ==> range(S) <<| \
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\ Ispair (lub(range(%i.Isfst(S i)))) (lub(range(%i.Issnd(S i))))"
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(fn prems =>
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        [
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        (cut_facts_tac prems 1),
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        (rtac is_lubI 1),
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        (rtac conjI 1),
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        (rtac ub_rangeI 1),
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        (rtac allI 1),
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        (res_inst_tac [("t","S(i)")] (surjective_pairing_Sprod RS ssubst) 1),
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        (rtac monofun_Ispair 1),
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        (rtac is_ub_thelub 1),
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        (etac (monofun_Isfst RS ch2ch_monofun) 1),
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        (rtac is_ub_thelub 1),
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        (etac (monofun_Issnd RS ch2ch_monofun) 1),
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        (strip_tac 1),
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        (res_inst_tac [("t","u")] (surjective_pairing_Sprod RS ssubst) 1),
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        (rtac monofun_Ispair 1),
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        (rtac is_lub_thelub 1),
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        (etac (monofun_Isfst RS ch2ch_monofun) 1),
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        (etac (monofun_Isfst RS ub2ub_monofun) 1),
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        (rtac is_lub_thelub 1),
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        (etac (monofun_Issnd RS ch2ch_monofun) 1),
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        (etac (monofun_Issnd RS ub2ub_monofun) 1)
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        ]);
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val thelub_sprod = (lub_sprod RS thelubI);
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qed_goal "cpo_sprod" Sprod2.thy 
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        "is_chain(S::nat=>'a**'b)==>? x.range(S)<<| x"
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(fn prems =>
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        [
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        (cut_facts_tac prems 1),
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        (rtac exI 1),
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        (etac lub_sprod 1)
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        ]);
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