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<b>let </b><font color="Maroon" title="c1">A</font> be    <a href="orders_2.html#L1" title="ORDERS_2:struct.1">RelStr</a> ;<br/>

<b>assume </b><a NAME="E1:9"/>
<font color="Maroon" title="c1">A</font> is <a href="orders_3.html#V1" title="ORDERS_3:attr.1">discrete</a>
 ;<br/>

<a NAME="E2:9"/><b>then </b>
the <a href="orders_2.html#U1" title="ORDERS_2:sel.1">InternalRel</a> of <font color="Maroon" title="c1">A</font> <a href="relset_1.html#R2" title="RELSET_1:pred.2">=</a>  <a href="partfun1.html#K6" title="PARTFUN1:func.6">id</a> the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c1">A</font>
 
<b>by </b><i><a class="ref" href="orders_3.html#D1" title="ORDERS_3:def.1">ORDERS_3:def 1</a></i>;<br/>
<b>hence </b><a NAME="E3:9"/>
<font color="Maroon" title="c1">A</font> is <a href="roughs_1.html#V1" title="ROUGHS_1:attr.1">diagonal</a>
 <b>by </b><i><a class="ref" href="roughs_1.html#D1" target="_self" title="ROUGHS_1:def.1">Def1</a></i>;<br/>


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