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Define the predicate subtract (X,Y,Z) for subtracting Y from X to get Z such that for instance, ?- subtract (p(s(0)), s(s(0)), Z). Z =
Define the predicate subtract (X,Y,Z) for subtracting Y from X to get Z such that for instance, ?- subtract (p(s(0)), s(s(0)), Z). Z = p(p(0)) ?- subtract (p(0), -s(s(0)), Z). Z = s(0) so that Z takes the form sn (0) or pn (0) for some n 0.
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An Introduction to Analysis
Authors: William R. Wade
4th edition
132296381, 978-0132296380
