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<div><span class="kw">theorem </span><a NAME="T5"><span class="comment"><font color="firebrick">:: GRZLOG_1:5</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">t</font> being   <a href="grzlog_1.html#NM2" title="GRZLOG_1:NM.2">GRZ-formula</a> holds <br/> ( <font color="Olive" title="b1">t</font> is  <a href="grzlog_1.html#V2" title="GRZLOG_1:attr.2">negative</a>  iff  ex <font color="Olive" title="b2">u</font> being   <a href="grzlog_1.html#NM2" title="GRZLOG_1:NM.2">GRZ-formula</a> st <font color="Olive" title="b1">t</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="grzlog_1.html#K15" title="GRZLOG_1:func.15">'not'</a> <font color="Olive" title="b2">u</font> )</div></div>
