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ord_proper_subset(+Set1, +Set2)

Checks whether Set1 is a proper subset of Set2
Set1
A set
Set2
A set

Description

Succeeds when every element of the ordered set Set1 appears in the ordered set Set2, and Set2 has at least on element that does not occur in Set1.

Modes and Determinism

See Also

ord_subset / 2, ord_compare / 3