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<div><span class="kw">theorem </span><a NAME="T7"><span class="comment"><font color="firebrick">:: GRZLOG_1:7</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#V4" title="GRZLOG_1:attr.4">being_equality</a>  iff  ex <font color="Olive" title="b2">u</font>, <font color="Olive" title="b3">v</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> <font color="Olive" title="b2">u</font> <a href="grzlog_1.html#K17" title="GRZLOG_1:func.17">'='</a> <font color="Olive" title="b3">v</font> )</div></div>
