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<a NAME="E1:16_1_1"/>
 <a href="grcat_1.html#K7" title="GRCAT_1:func.7">id</a> <font color="Maroon" title="c1">V</font> is <a href="vectmetr.html#V3" title="VECTMETR:attr.3">isometric</a>
 
<b>by </b><i><a class="ref" href="vectmetr.html#T5" target="_self" title="VECTMETR:th.5">Th5</a></i>;<br/>
<b>hence </b><a NAME="E2:16_1_1"/>
not  <a href="vectmetr.html#K2" title="VECTMETR:func.2">ISOM</a> <font color="Maroon" title="c1">V</font> is <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>
 <b>by </b><i><a class="ref" href="vectmetr.html#D4" target="_self" title="VECTMETR:def.4">Def4</a></i>;<br/>


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