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19 lines
608 B
Text
19 lines
608 B
Text
B Axioms 1 - 8 as for FD.
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9. ((A -> B) & (A -> C)) -> (A -> (B & C))
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10. ((A -> C) & (B -> C)) -> ((A v B) -> C)
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Rules 1 - 2, 8 - 12 as for FD.
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Rules 6 and 7 replaced by the above axioms.
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Rules 3 - 5 replaced by:
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4'. A -> B ==> (C -> A) -> (C -> B)
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5'. A -> B ==> (B -> C) -> (A -> C)
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DW is B with rule 8 replaced by the axiom form:
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Axiom 11. (A -> ~B) -> (B -> ~A)
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TW is DW with rules 4' and 5' replaced by the axiom forms:
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Axiom 12. (A -> B) -> ((C -> A) -> (C -> B))
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13. (A -> B) -> ((B -> C) -> (A -> C))
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