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link rel="stylesheet" href="docbook.css" type="text/css" /><meta name="generator" content="DocBook XSL Stylesheets V1.68.1" /><link rel="start" href="index.html" title="Matita V0.1.0 User Manual (rev. 1α)" /><link rel="up" href="sec_tactics.html" title="Chapter 6. Tactics" /><link rel="prev" href="tac_change.html" title="change <pattern> with sterm" /><link rel="next" href="tac_contradiction.html" title="contradiction" /></head><body><a xmlns="" href="../../"><div class="matita_logo"><img src="../../images/matita-tiny.png" alt="Tiny Matita logo" /><span>Matita Home</span></div></a><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">constructor nat</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="tac_change.html">Prev</a> </td><th width="60%" align="center">Chapter 6. Tactics</th><td width="20%" align="right"> <a accesskey="n" href="tac_contradiction.html">Next</a></td></tr></table><hr /></div><div class="sect1" lang="en" xml:lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="tac_constructor"></a>constructor <span class="emphasis"><em><a href="sec_terms.html#nat">nat</a></em></span></h2></div></div></div><p><strong class="userinput"><code>constructor n</code></strong></p><p>
</p><div class="variablelist"><dl><dt><span class="term">Pre-conditions:</span></dt><dd><p>The conclusion of the current sequent must be
an inductive type or the application of an inductive type with
at least <span><strong class="command">n</strong></span> constructors.</p></dd><dt><span class="term">Action:</span></dt><dd><p>It applies the <span><strong class="command">n</strong></span>-th constructor of the
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