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src/HOL/AxClasses/Lattice/tools.ML
changeset 1899 0075a8d26a80
parent 1440 de6f18da81bb
equal deleted inserted replaced
1898:260a9711f507 1899:0075a8d26a80 
     4 val prems = goalw HOL.thy [Ex_def] "EX x. P x ==> P (@x. P x)";
 
     4 val prems = goalw HOL.thy [Ex_def] "EX x. P x ==> P (@x. P x)";
 
     5   by (resolve_tac prems 1);
 
     5   by (resolve_tac prems 1);
 
     6 qed "selectI1";
 
     6 qed "selectI1";
 
     7 
     7 
     8 goal HOL.thy "(P & Q) = (Q & P)";
 
     8 goal HOL.thy "(P & Q) = (Q & P)";
 
     9   by (fast_tac prop_cs 1);
 
     9   by (Fast_tac 1);
 
    10 qed "conj_commut";
 
    10 qed "conj_commut";
isabelle