src/HOL/Isar_examples/Cantor.ML
author wenzelm
Sat Oct 30 20:20:48 1999 +0200 (1999-10-30)
changeset 7982 d534b897ce39
parent 7578 80525697a87c
child 9474 b0ce3b7c9c26
permissions -rw-r--r--
improved presentation;
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(* tactic script -- single steps *)
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Goal "EX S. S ~: range(f :: 'a => 'a set)";
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  by (rtac exI 1);
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  by (rtac notI 1);
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  by (etac rangeE 1);
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  by (etac equalityCE 1);
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  by (dtac CollectD 1);
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  by (contr_tac 1);
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  by (swap_res_tac [CollectI] 1);
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  by (assume_tac 1);
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qed "";
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(* tactic script -- automatic *)
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Goal "EX S. S ~: range(f :: 'a => 'a set)";
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  by (best_tac (claset() addSEs [equalityCE]) 1);
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qed "";