File: NO-DUPLICATESP-EQUAL.html

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<head><title>NO-DUPLICATESP-EQUAL.html  --  ACL2 Version 3.1</title></head>
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<h2>NO-DUPLICATESP-EQUAL</h2>check for duplicates in a list (using <code>equal</code> for equality)
<pre>Major Section:  <a href="PROGRAMMING.html">PROGRAMMING</a>
</pre><p>

<code>(no-duplicatesp-equal l)</code> is true if and only if no member of <code>l</code>
occurs twice in <code>l</code>.
<p>
<code>(no-duplicatesp-equal l)</code> has a <a href="GUARD.html">guard</a> of <code>(true-listp l)</code>.
Membership is tested using <code><a href="MEMBER-EQUAL.html">member-equal</a></code>, hence using <code><a href="EQUAL.html">equal</a></code> as
the test.
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