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<head><title>ACL2-PC_colon__colon_NX.html -- ACL2 Version 3.1</title></head>
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<h3>ACL2-PC::NX</h3>(atomic macro)
<code> </code>move forward one argument in the enclosing term
<pre>Major Section: <a href="PROOF-CHECKER-COMMANDS.html">PROOF-CHECKER-COMMANDS</a>
</pre><p>
<pre>
Example and General Form:
nx
</pre>
For example, if the conclusion is <code>(= x (* (- y) z))</code> and the
current subterm is <code>x</code>, then after executing <code>nx</code>, the current
subterm will be <code>(* (- y) z)</code>.
<p>
This is the same as <code>up</code> followed by <code>(dive n+1)</code>, where <code>n</code> is the
position of the current subterm in its parent term in the
conclusion. Thus in particular, the <code>nx</code> command fails if one is
already at the top of the conclusion.<p>
See also <code>up</code>, <code>dive</code>, <code>top</code>, and <code>bk</code>.
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