<?xml version="1.0"?>
<div>:: <span class="kw">deftheorem </span>   defines <a href="proofs_1.html#V8" title="PROOFS_1:attr.8">-derivable</a> <a onclick="hs(this)" href="javascript:()">PROOFS_1:def 15 : <br/></a><span> for <font color="Olive" title="b1">B</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a> <br/>  for <font color="Olive" title="b2">R</font>, <font color="Olive" title="b3">R1</font> being   <a href="proofs_1.html#NM2" title="PROOFS_1:NM.2">Rule</a> holds <br/> ( <font color="Olive" title="b3">R1</font> is <font color="Olive" title="b1">B</font>,<font color="Olive" title="b2">R</font> <a href="proofs_1.html#V8" title="PROOFS_1:attr.8">-derivable</a>  iff  for <font color="Olive" title="b4">S</font> being   <a href="proofs_1.html#NM3" title="PROOFS_1:NM.3">Formula-finset</a><br/>  for <font color="Olive" title="b5">t</font> being    <a href="hidden.html#M1" title="HIDDEN:mode.1">object</a>   st <span class="p1"><a href="tarski.html#K4" title="TARSKI:func.4">[</a><span class="default"><font color="Olive" title="b4">S</font>,<font color="Olive" title="b5">t</font></span><a href="tarski.html#K4" title="TARSKI:func.4">]</a></span> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Olive" title="b3">R1</font> holds <br/><font color="Olive" title="b1">B</font> <a href="xboole_0.html#K2" title="XBOOLE_0:func.2">\/</a> <font color="Olive" title="b4">S</font>,<font color="Olive" title="b2">R</font> <a href="proofs_1.html#R2" title="PROOFS_1:pred.2">|-</a> <font color="Olive" title="b5">t</font> );<br/></span></div>
