IOA/meta_theory/Solve.thy
author nipkow
Wed, 09 Nov 1994 19:51:09 +0100
changeset 168 44ff2275d44f
parent 156 fd1be45b64bf
child 249 492493334e0f
permissions -rw-r--r--
Added headers and made various small mods.

(*  Title:      HOL/IOA/meta_theory/Solve.thy
    ID:         $Id$
    Author:     Tobias Nipkow & Konrad Slind
    Copyright   1994  TU Muenchen

Weak possibilities mapping (abstraction)
*)

Solve = IOA +

consts

  is_weak_pmap :: "['c => 'a, ('action,'c)ioa,('action,'a)ioa] => bool"

defs

is_weak_pmap_def
  "is_weak_pmap(f,C,A) ==                       \
\   (!s:starts_of(C). f(s):starts_of(A)) &      \
\   (!s t a. reachable(C,s) &                   \
\            <s,a,t>:trans_of(C)                \
\            --> if(a:externals(asig_of(C)),    \
\                   <f(s),a,f(t)>:trans_of(A),  \
\                   f(s)=f(t)))"

end