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yap-6.3/Logtalk/examples/symdiff/x.lgt
2001-06-06 19:40:57 +00:00

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:- object(x,
implements(symdiffp)).
:- info([
authors is 'Paulo Moura',
version is 1.0,
date is 1999/12/29,
comment is 'Symbolic differentiation and simplification of a variable.',
source is 'Example based on the Clocksin and Mellish Prolog book.']).
diff(1).
simplify(x).
:- end_object.