754276a660
This commit also replaces the notation for divides
`(` a `|` b `)`
with
a `∣` b
The character `∣` is entered by typing \|
closes #516
14 lines
391 B
Text
14 lines
391 B
Text
import logic
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open tactic
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definition basic_tac : tactic
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:= repeat (apply @and.intro | assumption)
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set_begin_end_tactic basic_tac -- basic_tac is automatically applied to each element of a proof-qed block
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theorem tst (a b : Prop) (H : ¬ a ∨ ¬ b) (Hb : b) : ¬ a ∧ b :=
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begin
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assume Ha, or.elim H
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(assume Hna, @absurd _ false Ha Hna)
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(assume Hnb, @absurd _ false Hb Hnb)
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end
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