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<b>reconsider </b><font color="Maroon" title="c3">d</font> = <font color="Maroon" title="c2">d</font> as    <a href="subset_1.html#M2" title="SUBSET_1:mode.2">Element</a> of  <a href="numbers.html#K5" title="NUMBERS:func.5">NAT</a>  <b>by </b><i><a class="ref" href="ordinal1.html#D13" title="ORDINAL1:def.13">ORDINAL1:def 13</a></i>;<br/>
<a NAME="E2:23_1_1"/>
<font color="Maroon" title="c1">fp</font> <a href="wsierp_1.html#K1" title="WSIERP_1:func.1">.</a> <font color="Maroon" title="c3">d</font> is <a href="ordinal1.html#V7" title="ORDINAL1:attr.7">natural</a>
 
;<br/>
<b>hence </b><a NAME="E3:23_1_1"/>
<font color="Maroon" title="c1">fp</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c2">d</font> is <a href="ordinal1.html#V7" title="ORDINAL1:attr.7">natural</a>
 ;<br/>


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