initial version of 'isar proof assistant (Isabelle/Isar);

1 files changed, 12 insertions, 0 deletions

diff --git a/isar/Example.thy b/isar/Example.thy
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+
+theory Example = Main:;
+
+lemma "A --> B --> A";
+proof;
+  assume A;
+  show "B --> A";
+  proof;
+  qed;
+qed;
+
+end;