1440
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open LatInsts;
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goal thy "Inf {x, y} = x && y";
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br (Inf_uniq RS mp) 1;
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by (stac bin_is_Inf_eq 1);
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br inf_is_inf 1;
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qed "bin_Inf_eq";
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goal thy "Sup {x, y} = x || y";
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br (Sup_uniq RS mp) 1;
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by (stac bin_is_Sup_eq 1);
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br sup_is_sup 1;
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qed "bin_Sup_eq";
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(* Unions and limits *)
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goal thy "Inf (A Un B) = Inf A && Inf B";
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br (Inf_uniq RS mp) 1;
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1465
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by (rewtac is_Inf_def);
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1440
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by (safe_tac set_cs);
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br (conjI RS (le_trans RS mp)) 1;
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br inf_lb1 1;
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be Inf_lb 1;
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br (conjI RS (le_trans RS mp)) 1;
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br inf_lb2 1;
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be Inf_lb 1;
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by (stac le_inf_eq 1);
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br conjI 1;
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br Inf_ub_lbs 1;
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by (fast_tac set_cs 1);
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br Inf_ub_lbs 1;
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by (fast_tac set_cs 1);
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qed "Inf_Un_eq";
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goal thy "Inf (UN i:A. B i) = Inf {Inf (B i) |i. i:A}";
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br (Inf_uniq RS mp) 1;
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1465
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by (rewtac is_Inf_def);
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1440
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by (safe_tac set_cs);
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(*level 3*)
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br (conjI RS (le_trans RS mp)) 1;
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be Inf_lb 2;
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br (sing_Inf_eq RS subst) 1;
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br (Inf_subset_antimon RS mp) 1;
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by (fast_tac set_cs 1);
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(*level 8*)
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by (stac le_Inf_eq 1);
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by (safe_tac set_cs);
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by (stac le_Inf_eq 1);
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by (fast_tac set_cs 1);
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qed "Inf_UN_eq";
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goal thy "Sup (A Un B) = Sup A || Sup B";
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br (Sup_uniq RS mp) 1;
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1465
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by (rewtac is_Sup_def);
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1440
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by (safe_tac set_cs);
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br (conjI RS (le_trans RS mp)) 1;
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be Sup_ub 1;
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br sup_ub1 1;
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br (conjI RS (le_trans RS mp)) 1;
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be Sup_ub 1;
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br sup_ub2 1;
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by (stac ge_sup_eq 1);
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br conjI 1;
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br Sup_lb_ubs 1;
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by (fast_tac set_cs 1);
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br Sup_lb_ubs 1;
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by (fast_tac set_cs 1);
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qed "Sup_Un_eq";
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goal thy "Sup (UN i:A. B i) = Sup {Sup (B i) |i. i:A}";
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br (Sup_uniq RS mp) 1;
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1465
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by (rewtac is_Sup_def);
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1440
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by (safe_tac set_cs);
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(*level 3*)
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br (conjI RS (le_trans RS mp)) 1;
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be Sup_ub 1;
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br (sing_Sup_eq RS subst) 1;
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back();
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br (Sup_subset_mon RS mp) 1;
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by (fast_tac set_cs 1);
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(*level 8*)
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by (stac ge_Sup_eq 1);
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by (safe_tac set_cs);
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by (stac ge_Sup_eq 1);
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by (fast_tac set_cs 1);
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qed "Sup_UN_eq";
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