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CS's system S

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aarne
2005-12-20 14:20:42 +00:00
parent 774abf612d
commit 25b3168437
15 changed files with 562 additions and 0 deletions
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23
examples/systemS/Proof.gf Normal file
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@@ -0,0 +1,23 @@
abstract Proof = Formula ** {
cat
Text ;
Proof ;
[Formula] ;
fun
Start : [Formula] -> Formula -> Proof -> Text ;
Hypo : Proof ;
Implic : [Formula] -> Formula -> Proof -> Proof ;
RedAbs : Formula -> Proof -> Proof ;
ExFalso : Formula -> Proof ;
ConjSplit : Formula -> Formula -> Formula -> Proof -> Proof ;
ModPon : [Formula] -> Formula -> Proof -> Proof ;
Forget : [Formula] -> Formula -> Proof -> Proof ;
DeMorgan1, DeMorgan2 : Formula -> Formula -> Proof -> Proof ;
ImplicNeg : [Formula] -> Formula -> Proof -> Proof ;
NegRewrite : Formula -> [Formula] -> Proof -> Proof ;
}