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Peanos Axioms for the natural numbers in just a few lines of prolog
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| zero. | |
| nat(zero). | |
| nat(X) :- | |
| nat(Y), | |
| suc(Y,X). | |
| one. | |
| suc(zero,one). | |
| two. | |
| suc(one,two). | |
| otherZero. | |
| nat(otherZero). | |
| eq(X,Y) :- X==Y. | |
| eq(X,Y) :- | |
| suc(X,A), | |
| suc(Y,B), | |
| eq(A,B). | |
| otherOne. | |
| suc(otherZero,otherOne). | |
| suc(otherOne,two). | |
| % try ?- eq(zero,otherZero) |
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