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<div><span class="kw">theorem </span><a NAME="T30"><span class="comment"><font color="firebrick">:: NATTRA_1:30</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">A</font>, <font color="Olive" title="b2">B</font> being   <a href="cat_1.html#NM4" title="CAT_1:NM.4">Category</a><br/>  for <font color="Olive" title="b3">F</font> being    <a href="cat_1.html#M2" title="CAT_1:mode.2">Functor</a> of <font color="Olive" title="b1">A</font>,<font color="Olive" title="b2">B</font> holds   <a href="nattra_1.html#K4" title="NATTRA_1:func.4">id</a> <font color="Olive" title="b3">F</font> is    <a href="nattra_1.html#M3" title="NATTRA_1:mode.3">natural_equivalence</a> of <font color="Olive" title="b3">F</font>,<font color="Olive" title="b3">F</font></div></div>
