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20 lines
275 B
Plaintext
20 lines
275 B
Plaintext
-- 20 Dec 2005, 9.45
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abstract Formula = {
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cat
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Formula ;
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Term ;
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fun
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And, Or, If : (_,_ : Formula) -> Formula ;
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Not : Formula -> Formula ;
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Abs : Formula ;
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---- All, Exist : (Term -> Formula) -> Formula ;
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-- to test
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A, B, C : Formula ;
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} |