2014-01-05 20:05:08 +00:00
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import tactic
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2013-12-26 23:54:53 +00:00
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2014-01-05 20:05:08 +00:00
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theorem T1 (a b : Bool) : a \/ b => b \/ a.
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2014-01-06 03:10:21 +00:00
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apply discharge.
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2014-01-05 18:32:47 +00:00
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(* disj_hyp_tac() *)
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(* disj_tac() *)
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2013-12-05 12:41:08 +00:00
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back
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2013-12-26 23:54:53 +00:00
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exact.
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2014-01-05 18:32:47 +00:00
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(* disj_tac() *)
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2013-12-26 23:54:53 +00:00
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exact.
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done.
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2013-12-05 12:41:08 +00:00
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2014-01-05 18:32:47 +00:00
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(*
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2013-12-26 23:54:53 +00:00
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simple_tac = Repeat(OrElse(imp_tac(), assumption_tac(), disj_hyp_tac(), disj_tac())) .. now_tac()
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2014-01-05 18:32:47 +00:00
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*)
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2013-12-05 12:41:08 +00:00
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2014-01-05 20:05:08 +00:00
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theorem T2 (a b : Bool) : a \/ b => b \/ a.
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2013-12-26 23:54:53 +00:00
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simple_tac.
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done.
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2013-12-05 12:41:08 +00:00
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2014-01-05 20:05:08 +00:00
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print environment 1.
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