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| author | Josh Chen | 2020-07-08 15:55:48 +0200 |
|---|---|---|
| committer | Josh Chen | 2020-07-08 15:55:48 +0200 |
| commit | 07c51b1801bd701bef61cedd571a944d9bd37e8b (patch) | |
| tree | 16b9581f9f52af4058594cd503aa2eec1d2cb801 /spartan/lib/Maybe.thy | |
| parent | f0fab6e197510ce0e6d23a669f69de966701d495 (diff) | |
1. Initial `Definition` keyword. 2. ifelse.
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" |