</p><div class="variablelist"><dl><dt><span class="term">Pre-conditions:</span></dt><dd><p><span><strong class="command">p</strong></span> must be the proof of an equality,
possibly under some hypotheses.</p></dd><dt><span class="term">Action:</span></dt><dd><p>It looks in every term matched by <span><strong class="command">patt</strong></span>
for all the occurrences of the
</p><div class="variablelist"><dl><dt><span class="term">Pre-conditions:</span></dt><dd><p><span><strong class="command">p</strong></span> must be the proof of an equality,
possibly under some hypotheses.</p></dd><dt><span class="term">Action:</span></dt><dd><p>It looks in every term matched by <span><strong class="command">patt</strong></span>
for all the occurrences of the