2007-12-08 02:02:46

Operations on ordered sets

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Intersection(a, b) -> ordered-set

Return the intersection of the two sets as a new set (i.e., all the elements that are in both sets).
a, b

Not(a, b) -> ordered-set

Return the difference of the two sets as a new set (i.e., all the elements from set a that are not in set b).
a, b

Union(a, b) -> ordered-set

Return the union of the two sets as a new set (i.e., all the elements that are in either set).
a, b

Unique(a) -> ordered-set

Return a new set with any duplicates removed.
a