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<div><span class="kw">theorem </span><a NAME="T25"><span class="comment"><font color="firebrick">:: MOD_4:25</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">K</font> being   <a href="vectsp_1.html#NM3" title="VECTSP_1:NM.3">Ring</a> holds <br/> (  <a href="struct_0.html#K3" title="STRUCT_0:func.3">id</a> <font color="Olive" title="b1">K</font> is  <a href="mod_4.html#V8" title="MOD_4:attr.8">antiisomorphism</a>  iff <font color="Olive" title="b1">K</font> is   <a href="vectsp_2.html#NM1" title="VECTSP_2:NM.1">comRing</a> )</div></div>
