src/ZF/Coind/BCR.thy

Commented isof(c,t)

(*  Title: 	ZF/Coind/BCR.thy
    ID:         $Id$
    Author: 	Jacob Frost, Cambridge University Computer Laboratory
    Copyright   1995  University of Cambridge
*)

BCR = Values + Types +

(*Basic correspondence relation -- not completely specified, as it is a
  parameter of the proof.  A concrete version could be defined inductively.*)

consts
  isof :: "[i,i] => o"
rules
  isof_app "[| isof(c1,t_fun(t1,t2)); isof(c2,t1) |] ==> isof(c_app(c1,c2),t2)"

(*Its extension to environments*)

consts
  isofenv :: "[i,i] => o"
defs
  isofenv_def "isofenv(ve,te) ==   		\
\   ve_dom(ve) = te_dom(te) &   		\
\   ( ALL x:ve_dom(ve).   			\
\     EX c:Const. ve_app(ve,x) = v_const(c) & isof(c,te_app(te,x)))"
  
end