Nominal/Ex/SingleLet.thy
author Cezary Kaliszyk <kaliszyk@in.tum.de>
Mon, 03 May 2010 14:03:30 +0200
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child 2028 15c5a2926622
permissions -rw-r--r--
Equivariance fails for single let?
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theory SingleLet
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imports "../NewParser"
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begin
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atom_decl name
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ML {* val _ = cheat_alpha_eqvt := true *}
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nominal_datatype trm =
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  Var "name"
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| App "trm" "trm"
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| Lam x::"name" t::"trm"  bind_set x in t
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| Let a::"assg" t::"trm"  bind_set "bn a" in t
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and assg =
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  As "name" "trm"
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binder
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  bn::"assg \<Rightarrow> atom set"
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where
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  "bn (As x t) = {atom x}"
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thm alpha_trm_raw_alpha_assg_raw_alpha_bn_raw.intros[no_vars]
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thm trm_assg.fv
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thm trm_assg.supp
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thm trm_assg.eq_iff
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thm trm_assg.bn
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thm trm_assg.perm
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thm trm_assg.induct
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thm trm_assg.inducts
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thm trm_assg.distinct
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ML {* Sign.of_sort @{theory} (@{typ trm}, @{sort fs}) *}
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thm trm_assg.fv[simplified trm_assg.supp(1-2)]
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setup {* Context.theory_map (Nominal_ThmDecls.add_thm @{thm "permute_pure"}) *}
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declare permute_trm_raw_permute_assg_raw.simps[eqvt]
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declare alpha_gen_eqvt[eqvt]
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equivariance alpha_trm_raw
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end
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