diff options
| author | msozeau | 2007-03-19 16:54:25 +0000 |
|---|---|---|
| committer | msozeau | 2007-03-19 16:54:25 +0000 |
| commit | 38ff8d2b59a481ba489400ea194fdd78c6c2d5e1 (patch) | |
| tree | b0c539c86860a372b7356e6245e8db4fa50df16a /contrib/subtac/FunctionalExtensionality.v | |
| parent | 293675b06262698ba3b1ba30db8595bedd5c55ae (diff) | |
Add a parameter to QuestionMark evar kind to say it can be turned into an obligations (even an opaque one).
Change cast_type to include the converted-to type or nothing in case of a Coerce cast, required much minor changes.
Various little subtac changes.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@9718 85f007b7-540e-0410-9357-904b9bb8a0f7
Diffstat (limited to 'contrib/subtac/FunctionalExtensionality.v')
| -rw-r--r-- | contrib/subtac/FunctionalExtensionality.v | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/contrib/subtac/FunctionalExtensionality.v b/contrib/subtac/FunctionalExtensionality.v index 07a19ab376..4610f3467a 100644 --- a/contrib/subtac/FunctionalExtensionality.v +++ b/contrib/subtac/FunctionalExtensionality.v @@ -1,3 +1,11 @@ +Lemma equal_f : forall A B : Type, forall (f g : A -> B), + f = g -> forall x, f x = g x. +Proof. + intros. + rewrite H. + auto. +Qed. + Axiom fun_extensionality : forall A B (f g : A -> B), (forall x, f x = g x) -> f = g. |