File: GROUND-ZERO.html

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<head><title>GROUND-ZERO.html  --  ACL2 Version 3.1</title></head>
<body text=#000000 bgcolor="#FFFFFF">
<h2>GROUND-ZERO</h2><a href="ENABLE.html">enable</a>d rules in the <a href="STARTUP.html">startup</a> theory
<pre>Major Section:  <a href="THEORIES.html">THEORIES</a>
</pre><p>

ACL2 concludes its initialization <code>(boot-strapping)</code> procedure by
defining the theory <code>ground-zero</code>; see <a href="THEORIES.html">theories</a>.  In fact, this
theory is just the theory defined by <code>(current-theory :here)</code> at the
conclusion of initialization; see <a href="CURRENT-THEORY.html">current-theory</a>.
<p>
Note that by executing the event

<pre>
(in-theory (current-theory 'ground-zero))
</pre>

you can restore the current theory to its value at the time you started up
ACL2.
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