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<div><span class="kw">theorem </span><a NAME="T28"><span class="comment"><font color="firebrick">:: PARTIT1:28</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">Y</font> being   non  <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>   <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a> <br/>  for <font color="Olive" title="b2">PA</font>, <font color="Olive" title="b3">PB</font> being    <a href="eqrel_1.html#M1" title="EQREL_1:mode.1">a_partition</a> of <font color="Olive" title="b1">Y</font> holds  <font color="Olive" title="b2">PA</font> <a href="partit1.html#K3" title="PARTIT1:func.3">'\/'</a> <span class="p1">(<span class="default"><font color="Olive" title="b2">PA</font> <a href="partit1.html#K2" title="PARTIT1:func.2">'/\'</a> <font color="Olive" title="b3">PB</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b2">PA</font></div></div>
