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   2 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>fwd</title><link rel="stylesheet" type="text/css" href="docbook.css" /><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /><link rel="home" href="index.html" title="Matita V0.5.9 User Manual (rev. 0.5.9 )" /><link rel="up" href="sec_tactics.html" title="Chapter 7. Tactics" /><link rel="prev" href="tac_fourier.html" title="fourier" /><link rel="next" href="tac_generalize.html" title="generalize" /></head><body><a xmlns="" href="../../../"><div class="matita_logo"><img src="figures/matita.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">fwd</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="tac_fourier.html">Prev</a> </td><th width="60%" align="center">Chapter 7. Tactics</th><td width="20%" align="right"> <a accesskey="n" href="tac_generalize.html">Next</a></td></tr></table><hr /></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="tac_fwd"></a>fwd</h2></div></div></div><p><strong class="userinput"><code>fwd H as H<sub>0</sub> ... H<sub>n</sub></code></strong></p><p>
   3       </p><div class="variablelist"><dl class="variablelist"><dt><span class="term">Synopsis:</span></dt><dd><p><span class="bold"><strong>fwd</strong></span> <span class="emphasis"><em><a class="link" href="sec_terms.html#grammar.id">id</a></em></span> [<span class="bold"><strong>as</strong></span> <span class="emphasis"><em><a class="link" href="sec_terms.html#grammar.id">id</a></em></span> [<span class="emphasis"><em><a class="link" href="sec_terms.html#grammar.id">id</a></em></span>]…]</p></dd><dt><span class="term">Pre-conditions:</span></dt><dd><p>
   4                The type of <span class="command"><strong>H</strong></span> must be the premise of a
   5                forward simplification theorem.
   6             </p></dd><dt><span class="term">Action:</span></dt><dd><p>
   7              This tactic is under development.
   8              It simplifies the current context by removing
   9              <span class="command"><strong>H</strong></span> using the following methods:
  10              forward application (by <span class="command"><strong>lapply</strong></span>) of a suitable
  11              simplification theorem, chosen automatically, of which the type
  12              of <span class="command"><strong>H</strong></span> is a premise,
  13              decomposition (by <span class="command"><strong>decompose</strong></span>),
  14              rewriting (by <span class="command"><strong>rewrite</strong></span>).
  15              <span class="command"><strong>H<sub>0</sub> ... H<sub>n</sub></strong></span>
  16              are passed to the tactics <span class="command"><strong>fwd</strong></span> invokes, as
  17              names for the premise they introduce.
  18             </p></dd><dt><span class="term">New sequents to prove:</span></dt><dd><p>
  19              The ones opened by the tactics <span class="command"><strong>fwd</strong></span> invokes.
  20             </p></dd></dl></div><p>
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