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Tutorial/Minimal.thy
author Christian Urban <urbanc@in.tum.de>
Tue, 07 Jun 2011 08:52:59 +0100
changeset 2821 c7d4bd9e89e0
parent 2686 52e1e98edb34
child 3132 87eca760dcba
permissions -rw-r--r--
fixed problem with earlier commit about nominal_function_common; added facility for specifying an invariant - added a definition of frees_set which need a finiteness invariant

theory Minimal
imports "Nominal2"
begin

atom_decl name

nominal_datatype lam =
  Var "name"
| App "lam" "lam"
| Lam x::"name" l::"lam"  bind x in l ("Lam [_]. _" [100, 100] 100)



lemma alpha_test:
  shows "Lam [x]. (Var x) = Lam [y]. (Var y)"
  by (simp add: lam.eq_iff Abs1_eq_iff lam.fresh fresh_at_base)

end
nominal2