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-rw-r--r--spartan/core/Spartan.thy3
1 files changed, 3 insertions, 0 deletions
diff --git a/spartan/core/Spartan.thy b/spartan/core/Spartan.thy
index b0fec5a..3d59464 100644
--- a/spartan/core/Spartan.thy
+++ b/spartan/core/Spartan.thy
@@ -115,6 +115,9 @@ translations "\<Sum>x: A. B" \<rightleftharpoons> "CONST Sig A (\<lambda>x. B)"
abbreviation Prod (infixl "\<times>" 60)
where "A \<times> B \<equiv> \<Sum>_: A. B"
+abbreviation "and" (infixl "\<and>" 60)
+ where "A \<and> B \<equiv> A \<times> B"
+
axiomatization where
SigF: "\<lbrakk>\<And>x. x: A \<Longrightarrow> B x: U i; A: U i\<rbrakk> \<Longrightarrow> \<Sum>x: A. B x: U i" and