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   3      * as H
   4     </code></strong></p><p>
   5       </p><div class="variablelist"><dl class="variablelist"><dt><span class="term">Synopsis:</span></dt><dd><p>
   6              <span class="bold"><strong>*</strong></span>
   7              [<span class="bold"><strong>as</strong></span> <span class="emphasis"><em><a class="link" href="sec_terms.html#grammar.id">id</a></em></span>]
   8             </p></dd><dt><span class="term">Pre-conditions:</span></dt><dd><p>The current conclusion must be of the form
   9              <span class="command"><strong>T → G</strong></span> where <span class="command"><strong>I</strong></span> is
  10              an inductive type applied to its arguments, if any.</p></dd><dt><span class="term">Action:</span></dt><dd><p>
  11              It introduces a new hypothesis <span class="command"><strong>H</strong></span> of type
  12              <span class="command"><strong>T</strong></span>. Then it proceeds by cases over
  13              <span class="command"><strong>H</strong></span>. Finally, if the name <span class="command"><strong>H</strong></span>
  14              is not specified, it clears the new hypothesis from all contexts.
  15             </p></dd><dt><span class="term">New sequents to prove:</span></dt><dd><p>
  16              The ones generated by case analysis.
  17             </p></dd></dl></div><p>
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