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feat(library/general_notation): reserve unary minus

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Leonardo de Moura 2014-11-13 22:08:20 -08:00
parent 58525905d0
commit e7a7458922
2 changed files with 2 additions and 2 deletions
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3
library/data/int/basic.lean
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@ -256,8 +256,7 @@ calc
definition neg : ℤ → ℤ := quotient_map quotient flip definition neg : ℤ → ℤ := quotient_map quotient flip
-- TODO: is this good? Note: replacing 100 by max makes it bind stronger than application. notation `-` x := neg x
notation `-` x:100 := neg x
theorem neg_comp (n m : ℕ) : -(psub (pair n m)) = psub (pair m n) := theorem neg_comp (n m : ℕ) : -(psub (pair n m)) = psub (pair m n) :=
have H : ∀a, -(psub a) = psub (flip a), have H : ∀a, -(psub a) = psub (flip a),

1
library/general_notation.lean
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@ -49,6 +49,7 @@ reserve infixl `-`:65
reserve infixl `*`:70 reserve infixl `*`:70
reserve infixl `div`:70 reserve infixl `div`:70
reserve infixl `mod`:70 reserve infixl `mod`:70
reserve prefix `-`:100
reserve infix `<=`:50 reserve infix `<=`:50
reserve infix `≤`:50 reserve infix `≤`:50