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<div><span class="kw">theorem </span><a NAME="T54"><span class="comment"><font color="firebrick">:: ZF_LANG1:54</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">H</font> being   <a href="zf_lang.html#NM2" title="ZF_LANG:NM.2">ZF-formula</a> holds  <font color="Olive" title="b1">H</font> <a href="tarski.html#R2" title="TARSKI:pred.2">in</a>  <a href="zf_lang.html#K28" title="ZF_LANG:func.28">Subformulae</a> <font color="Olive" title="b1">H</font></div></div>
