diff options
Diffstat (limited to 'spartan/lib/Maybe.thy')
| -rw-r--r-- | spartan/lib/Maybe.thy | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/spartan/lib/Maybe.thy b/spartan/lib/Maybe.thy index 1efbb95..6729812 100644 --- a/spartan/lib/Maybe.thy +++ b/spartan/lib/Maybe.thy @@ -17,7 +17,7 @@ lemma Maybe_some: "a: A \<Longrightarrow> some A a: Maybe A" unfolding Maybe_def none_def some_def by typechk+ -Lemma (derive) MaybeInd: +Definition MaybeInd: assumes "A: U i" "\<And>m. m: Maybe A \<Longrightarrow> C m: U i" |