michael/lean2
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

refactor(library/logic/decidable): rename decidable_rel -> decidable_pred, and decidable_rel2 -> decidable_rel

Browse source
This commit is contained in:
Leonardo de Moura 2014-11-21 11:49:31 -08:00
parent 19d0afe160
commit 2e121182de
1 changed files with 3 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
library/logic/decidable.lean
View file

@ -91,9 +91,9 @@ namespace decidable
rec_on H (λh, H3 h) (λh, H4 h) --this can be proven using dependent version of "by_cases"
end decidable
definition decidable_rel {A : Type} (R : A → Prop) := Π (a : A), decidable (R a)
definition decidable_rel2 {A : Type} (R : A → A → Prop) := Π (a b : A), decidable (R a b)
definition decidable_eq (A : Type) := decidable_rel2 (@eq A)
definition decidable_pred {A : Type} (R : A → Prop) := Π (a : A), decidable (R a)
definition decidable_rel {A : Type} (R : A → A → Prop) := Π (a b : A), decidable (R a b)
definition decidable_eq (A : Type) := decidable_rel (@eq A)
--empty cannot depend on decidable, so we prove this here
protected definition empty.has_decidable_eq [instance] : decidable_eq empty :=