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<H1>proper subset</H1>
<P>
(definition)

<P>
<strong>Definition:</strong>
A <a href="set.html" tppabs="http://hissa.nist.gov/dads/HTML/set.html"><em>set</em></a> S<sub>2</sub> is a proper subset of another set S<sub>1</sub> if every element in S<sub>2</sub> is in S<sub>1</sub> and S<sub>1</sub> has some elements which are not in S<sub>2</sub>.
<P><strong>See also</strong>
<a href="subset.html" tppabs="http://hissa.nist.gov/dads/HTML/subset.html"><em>subset</em></a>, <a href="superset.html" tppabs="http://hissa.nist.gov/dads/HTML/superset.html"><em>superset</em></a>.
<P>Author: <a href="terms.html#authorPEB" tppabs="http://hissa.nist.gov/dads/terms.html#authorPEB">PEB</a>

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Entry modified Wed Mar 17 10:34:37 1999.<BR>
HTML page formatted Wed Dec 22 09:36:15 1999.

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