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<div><span class="kw">theorem </span><a NAME="T22"><span class="comment"><font color="firebrick">:: PENCIL_1:22</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">S</font> being   non  <a href="pencil_1.html#V3" title="PENCIL_1:attr.3">void</a>   <a href="pre_topc.html#L1" title="PRE_TOPC:struct.1">TopStruct</a>  holds   <a href="struct_0.html#K2" title="STRUCT_0:func.2">[#]</a> <font color="Olive" title="b1">S</font> is  <a href="pencil_1.html#V1" title="PENCIL_1:attr.1">closed_under_lines</a> </div></div>
