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(* Title: HOL/IOA/meta_theory/Solve.thy
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ID: $Id$
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Author: Tobias Nipkow & Konrad Slind
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Copyright 1994 TU Muenchen
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Weak possibilities mapping (abstraction)
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*)
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156
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Solve = IOA +
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consts
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is_weak_pmap :: "['c => 'a, ('action,'c)ioa,('action,'a)ioa] => bool"
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168
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defs
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156
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is_weak_pmap_def
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"is_weak_pmap(f,C,A) == \
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\ (!s:starts_of(C). f(s):starts_of(A)) & \
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\ (!s t a. reachable(C,s) & \
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\ <s,a,t>:trans_of(C) \
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\ --> if(a:externals(asig_of(C)), \
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\ <f(s),a,f(t)>:trans_of(A), \
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156
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\ f(s)=f(t)))"
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end
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