lean2/tests/lean/run/tactic12.lean

import logic
open tactic

theorem tst (a b : Prop) (H : ¬ a ∨ ¬ b) (Hb : b) : ¬ a ∧ b
:= begin
      apply and.intro,
      exact
        (assume Ha, or.elim H
          (assume Hna, @absurd _ false Ha Hna)
          (assume Hnb, @absurd _ false Hb Hnb)),
      assumption
   end
-												chore(*): minimize dependencies on tests

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

											
										
										
											2014-08-24 19:58:48 -07:00
+								import logic
-												feat(frontends/lean): rename 'using' command to 'open'

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

											
										
										
											2014-09-03 16:00:38 -07:00
+								open tactic
-												feat(library/tactic): add 'exact' tactic

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

											
										
										
											2014-07-02 18:32:44 -07:00
-												refactor(*): rename Bool to Prop

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

											
										
										
											2014-07-22 09:43:18 -07:00
+								theorem tst (a b : Prop) (H : ¬ a ∨ ¬ b) (Hb : b) : ¬ a ∧ b
-												feat(library/tactic): improve 'assumption' tactic

- It uses the unifier in "conservative" mode
- It only affects the current goal

closes #570

											
										
										
											2015-05-02 17:32:03 -07:00
+								:= begin
 								      apply and.intro,
-												feat(library/tactic): add 'exact' tactic

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

											
										
										
											2014-07-02 18:32:44 -07:00
+								      exact
-												refactor(library): add namespaces 'or', 'and' and 'iff'

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

											
										
										
											2014-09-04 21:25:21 -07:00
+								        (assume Ha, or.elim H
-												refactor(library/logic/basic): rename absurd_elim to absurd, delete contrapos and trivial_not_true theorems

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

											
										
										
											2014-08-27 18:34:09 -07:00
+								          (assume Hna, @absurd _ false Ha Hna)
-												feat(library/tactic): improve 'assumption' tactic

- It uses the unifier in "conservative" mode
- It only affects the current goal

closes #570

											
										
										
											2015-05-02 17:32:03 -07:00
+								          (assume Hnb, @absurd _ false Hb Hnb)),
 								      assumption
 								   end