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<b>let </b><font color="Maroon">o1</font> be   <a href="ordinal1.html#NM2">Ordinal</a>;<br/><b>let </b><font color="Maroon">o2</font> be   <a href="ordinal1.html#NM2">Ordinal</a>;<br/><b>let </b><font color="Maroon">b1</font> be    <a href="polynom1.html#M1">Element</a> of  <a href="polynom1.html#K14">Bags</a> <font color="Maroon">o1</font>, <font color="Maroon">c1</font> be    <a href="polynom1.html#M1">Element</a> of  <a href="polynom1.html#K14">Bags</a> <font color="Maroon">o1</font>;<br/><b>let </b><font color="Maroon">b2</font> be    <a href="polynom1.html#M1">Element</a> of  <a href="polynom1.html#K14">Bags</a> <font color="Maroon">o2</font>, <font color="Maroon">c2</font> be    <a href="polynom1.html#M1">Element</a> of  <a href="polynom1.html#K14">Bags</a> <font color="Maroon">o2</font>;<br/>







<b>assume </b><a NAME="E1:15"/><i><font color="Green">E35</font></i>: 
( <font color="Maroon">b1</font> <a href="polynom1.html#R3">divides</a> <font color="Maroon">c1</font> &amp; <font color="Maroon">b2</font> <a href="polynom1.html#R3">divides</a> <font color="Maroon">c2</font> )
 ;<br/>

<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="15_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">k</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>assume </b><a NAME="E1:15_1"/><i><font color="Green">E36</font></i>: 
<font color="Maroon">k</font> <a href="hidden.html#R2">in</a> <font color="Maroon">o1</font> <a href="ordinal2.html#K10">+^</a> <font color="Maroon">o2</font>
 ;<br/><b>reconsider </b><font color="Maroon">b1'</font> = <font color="Maroon">b1</font>, <font color="Maroon">c1'</font> = <font color="Maroon">c1</font> as   <a href="polynom1.html#NM1">bag</a> of <font color="Maroon">o1</font> ;<br/><a NAME="E3:15_1"/><i><font color="Green">E37</font></i>: 
<font color="Maroon">b1'</font> <a href="polynom1.html#K8">.</a> <font color="Maroon">k</font> <a href="xxreal_0.html#R1">&lt;=</a> <font color="Maroon">c1'</font> <a href="polynom1.html#K8">.</a> <font color="Maroon">k</font>
 <b>by </b><i>, <a class="ref" href="polynom1.html#D13">POLYNOM1:def 13</a></i>;<br/><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="15_1_1"><b>per </b></a><a class="txt" onclick="hs(this)" href="javascript:()"><b>cases </b></a><span class="hide"><a NAME="E1:15_1_1"/>
( <font color="Maroon">k</font> <a href="hidden.html#R2">in</a> <font color="Maroon">o1</font> or <font color="Maroon">k</font> <a href="hidden.html#R2">in</a> <span class="p1">(<span class="default"><font color="Maroon">o1</font> <a href="ordinal2.html#K10">+^</a> <font color="Maroon">o2</font></span>)</span> <a href="subset_1.html#K6">\</a> <font color="Maroon">o1</font> )
 </span><b>by </b><i>, <a class="ref" href="xboole_0.html#D4">XBOOLE_0:def 4</a></i>;<br/><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="15_1_1_1"><b>suppose </b></a><a NAME="E1:15_1_1_1"/><i><font color="Green">E38</font></i>: 
<font color="Maroon">k</font> <a href="hidden.html#R2">in</a> <font color="Maroon">o1</font>
 ;<br/><div class="add"><b>then reconsider </b><font color="Maroon">k'</font> = <font color="Maroon">k</font> as   <a href="ordinal1.html#NM2">Ordinal</a> <b>by </b><i><a class="ref" href="ordinal1.html#T23">ORDINAL1:23</a></i>;<br/><a NAME="E3:15_1_1_1"/>
<span class="p1">(<span class="default"><font color="Maroon">b1</font> <a href="polynom6.html#K1" target="_self">+^</a> <font color="Maroon">b2</font></span>)</span> <a href="polynom1.html#K8">.</a> <font color="Maroon">k'</font> <a href="hidden.html#R1">=</a> <font color="Maroon">b1</font> <a href="polynom1.html#K8">.</a> <font color="Maroon">k'</font>
 <b>by </b><i>, </i>;<br/><b>hence </b><a NAME="E4:15_1_1_1"/>
<span class="p1">(<span class="default"><font color="Maroon">b1</font> <a href="polynom6.html#K1" target="_self">+^</a> <font color="Maroon">b2</font></span>)</span> <a href="polynom1.html#K8">.</a> <font color="Maroon">k</font> <a href="xxreal_0.html#R1">&lt;=</a> <span class="p1">(<span class="default"><font color="Maroon">c1</font> <a href="polynom6.html#K1" target="_self">+^</a> <font color="Maroon">c2</font></span>)</span> <a href="polynom1.html#K8">.</a> <font color="Maroon">k</font>
 <b>by </b><i>, , </i>;<br/></div><b>end;</b></div><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="15_1_1_2"><b>suppose </b></a><a NAME="E1:15_1_1_2"/><i><font color="Green">E39</font></i>: 
<font color="Maroon">k</font> <a href="hidden.html#R2">in</a> <span class="p1">(<span class="default"><font color="Maroon">o1</font> <a href="ordinal2.html#K10">+^</a> <font color="Maroon">o2</font></span>)</span> <a href="subset_1.html#K6">\</a> <font color="Maroon">o1</font>
 ;<br/><div class="add"><a NAME="E2:15_1_1_2"/><b>then </b>
<font color="Maroon">k</font> <a href="hidden.html#R2">in</a> <font color="Maroon">o1</font> <a href="ordinal2.html#K10">+^</a> <font color="Maroon">o2</font>
 ;<br/><b>then reconsider </b><font color="Maroon">k'</font> = <font color="Maroon">k</font> as   <a href="ordinal1.html#NM2">Ordinal</a> <b>by </b><i><a class="ref" href="ordinal1.html#T23">ORDINAL1:23</a></i>;<br/><a NAME="E4:15_1_1_2"/><i><font color="Green">E40</font></i>: 
<span class="p1">(<span class="default"><font color="Maroon">b1</font> <a href="polynom6.html#K1" target="_self">+^</a> <font color="Maroon">b2</font></span>)</span> <a href="polynom1.html#K8">.</a> <font color="Maroon">k'</font> <a href="hidden.html#R1">=</a> <font color="Maroon">b2</font> <a href="polynom1.html#K8">.</a> <span class="p1">(<span class="default"><font color="Maroon">k'</font> <a href="ordinal3.html#K5">-^</a> <font color="Maroon">o1</font></span>)</span>
 <b>by </b><i>, </i>;<br/><a NAME="E5:15_1_1_2"/>
<span class="p1">(<span class="default"><font color="Maroon">c1</font> <a href="polynom6.html#K1" target="_self">+^</a> <font color="Maroon">c2</font></span>)</span> <a href="polynom1.html#K8">.</a> <font color="Maroon">k'</font> <a href="hidden.html#R1">=</a> <font color="Maroon">c2</font> <a href="polynom1.html#K8">.</a> <span class="p1">(<span class="default"><font color="Maroon">k'</font> <a href="ordinal3.html#K5">-^</a> <font color="Maroon">o1</font></span>)</span>
 <b>by </b><i>, </i>;<br/><b>hence </b><a NAME="E6:15_1_1_2"/>
<span class="p1">(<span class="default"><font color="Maroon">b1</font> <a href="polynom6.html#K1" target="_self">+^</a> <font color="Maroon">b2</font></span>)</span> <a href="polynom1.html#K8">.</a> <font color="Maroon">k</font> <a href="xxreal_0.html#R1">&lt;=</a> <span class="p1">(<span class="default"><font color="Maroon">c1</font> <a href="polynom6.html#K1" target="_self">+^</a> <font color="Maroon">c2</font></span>)</span> <a href="polynom1.html#K8">.</a> <font color="Maroon">k</font>
 <b>by </b><i>, , <a class="ref" href="polynom1.html#D13">POLYNOM1:def 13</a></i>;<br/></div><b>end;</b></div></div><b>end;</b></div></div><b>end;</b></div>
<b>hence </b><a NAME="E3:15"/>
<font color="Maroon">b1</font> <a href="polynom6.html#K1" target="_self">+^</a> <font color="Maroon">b2</font> <a href="polynom1.html#R3">divides</a> <font color="Maroon">c1</font> <a href="polynom6.html#K1" target="_self">+^</a> <font color="Maroon">c2</font>
 <b>by </b><i><a class="ref" href="polynom1.html#T50">POLYNOM1:50</a></i>;<br/>


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