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<span class="kw">let </span><font color="Maroon" title="c1">n</font> be    <a href="ordinal1.html#NM1" title="ORDINAL1:NM.1">number</a> ; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> ( <font color="Maroon" title="c1">n</font> is  <a href="ordinal1.html#V7" title="ORDINAL1:attr.7">natural</a>  implies <font color="Maroon" title="c1">n</font> is  <a href="ordinal1.html#V3" title="ORDINAL1:attr.3">ordinal</a>  )</span><br/>

<span class="kw">assume </span><a NAME="E1:83_1_1"/>
<font color="Maroon" title="c1">n</font> is  <a href="ordinal1.html#V7" title="ORDINAL1:attr.7">natural</a> 
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> <font color="Maroon" title="c1">n</font> is  <a href="ordinal1.html#V3" title="ORDINAL1:attr.3">ordinal</a> </span><br/>

<span class="kw">then </span><span class="kw">reconsider </span><font color="Maroon" title="c2">n</font> = <font color="Maroon" title="c1">n</font> as    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="ordinal1.html#K5" title="ORDINAL1:func.5">omega</a>  <span class="kw">by</span> <span class="lab"><a class="ref" href="ordinal1.html#D13" target="_self" title="ORDINAL1:def.13">Def13</a></span>;<br/>
<a NAME="E3:83_1_1"/>
<font color="Maroon" title="c2">n</font> is  <a href="ordinal1.html#V3" title="ORDINAL1:attr.3">ordinal</a> 
 
;<br/>
<span class="kw">hence </span><a NAME="E4:83_1_1"/>
<font color="Maroon" title="c1">n</font> is  <a href="ordinal1.html#V3" title="ORDINAL1:attr.3">ordinal</a> 
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


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