NIST

proper subset

(definition)

Definition: A set S2 is a proper subset of another set S1 if every element in S2 is in S1 and S1 has some elements which are not in S2.

See also subset, superset.

Author: PEB

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Entry modified 17 December 2004.
HTML page formatted Wed Mar 13 12:42:46 2019.

Cite this as:
Paul E. Black, "proper subset", in Dictionary of Algorithms and Data Structures [online], Paul E. Black, ed. 17 December 2004. (accessed TODAY) Available from: https://www.nist.gov/dads/HTML/propersubset.html