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1 (* Title: HOL/IOA/meta_theory/Solve.thy |
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2 ID: $Id$ |
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3 Author: Tobias Nipkow & Konrad Slind |
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4 Copyright 1994 TU Muenchen |
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5 |
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6 Weak possibilities mapping (abstraction) |
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7 *) |
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8 |
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9 Solve = IOA + |
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10 |
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11 constdefs |
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12 |
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13 is_weak_pmap :: "['c => 'a, ('action,'c)ioa,('action,'a)ioa] => bool" |
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14 "is_weak_pmap f C A == |
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15 (!s:starts_of(C). f(s):starts_of(A)) & |
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16 (!s t a. reachable C s & |
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17 (s,a,t):trans_of(C) |
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18 --> (if a:externals(asig_of(C)) then |
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19 (f(s),a,f(t)):trans_of(A) |
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20 else f(s)=f(t)))" |
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21 |
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22 end |