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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E29">Th19</font></span>: <a NAME="T19"><span class="comment"><font color="firebrick">:: AOFA_L00:19</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">I</font> being    <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a> <br/>  for <font color="Olive" title="b2">a</font> being    <a href="hidden.html#M1" title="HIDDEN:mode.1">object</a>  holds   <a href="funct_3.html#K9" title="FUNCT_3:func.9">pr1</a> (<font color="Olive" title="b1">I</font>,<span class="p1"><a href="tarski.html#K1" title="TARSKI:func.1">{</a><span class="default"><font color="Olive" title="b2">a</font></span><a href="tarski.html#K1" title="TARSKI:func.1">}</a></span>) is  <a href="funct_1.html#V2" title="FUNCT_1:attr.2">one-to-one</a> </div></div>
