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<head><title>ADD-INVISIBLE-FNS.html -- ACL2 Version 3.1</title></head>
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<h2>ADD-INVISIBLE-FNS</h2>make some unary functions invisible to the <a href="LOOP-STOPPER.html">loop-stopper</a> algorithm
<pre>Major Section: <a href="EVENTS.html">EVENTS</a>
</pre><p>
<pre>
Examples:
(add-invisible-fns binary-+ unary-- foo)
</pre>
The setting above has makes unary functions <code><a href="UNARY--.html">unary--</a></code> and <code>foo</code>
``invisible'' for the purposes of applying permutative <code>:</code><code><a href="REWRITE.html">rewrite</a></code>
rules to <code><a href="BINARY-+.html">binary-+</a></code> trees. Thus, <code>arg</code> and <code>(unary-- arg)</code> will be
given the same weight and will be permuted so as to be adjacent.
<p>
<pre>
General Form:
(add-invisible-fns top-fn unary-fn1 ... unary-fnk)
</pre>
where <code>top-fn</code> is a function symbol and the <code>unary-fni</code> are unary
function symbols.<p>
For more information see <a href="INVISIBLE-FNS-TABLE.html">invisible-fns-table</a>. Also
see <a href="SET-INVISIBLE-FNS-TABLE.html">set-invisible-fns-table</a>, which explains how to set the entire table in a
single event, and see <a href="REMOVE-INVISIBLE-FNS.html">remove-invisible-fns</a>.
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