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<b>let </b><font color="Maroon" title="c4">IT1</font>, <font color="Maroon" title="c5">IT2</font> be   <a href="polynom1.html#NM1" title="POLYNOM1:NM.1">bag</a> of <font color="Maroon" title="c1">n</font>;<br/>

<b>assume </b><b>that </b><br/><a NAME="E1:20_1_2"/><i><font color="Green" title="E15">A24</font></i>: 
<font color="Maroon" title="c4">IT1</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c3">B</font>
 <b>and </b><br/><a NAME="E2:20_1_2"/><i><font color="Green" title="E16">A25</font></i>: 
for <font color="Olive" title="b1">x</font> being  <a href="polynom1.html#NM1" title="POLYNOM1:NM.1">bag</a> of <font color="Maroon" title="c1">n</font>  st <font color="Olive" title="b1">x</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c3">B</font> holds <br/><font color="Olive" title="b1">x</font> <a href="termord.html#R1" title="TERMORD:pred.1">&lt;=</a> <font color="Maroon" title="c4">IT1</font>,<font color="Maroon" title="c2">T</font>
 <b>and </b><br/><a NAME="E3:20_1_2"/><i><font color="Green" title="E17">A26</font></i>: 
<font color="Maroon" title="c5">IT2</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c3">B</font>
 <b>and </b><br/><a NAME="E4:20_1_2"/><i><font color="Green" title="E18">A27</font></i>: 
for <font color="Olive" title="b1">x</font> being  <a href="polynom1.html#NM1" title="POLYNOM1:NM.1">bag</a> of <font color="Maroon" title="c1">n</font>  st <font color="Olive" title="b1">x</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c3">B</font> holds <br/><font color="Olive" title="b1">x</font> <a href="termord.html#R1" title="TERMORD:pred.1">&lt;=</a> <font color="Maroon" title="c5">IT2</font>,<font color="Maroon" title="c2">T</font>
 ;<br/>

<a NAME="E5:20_1_2"/><i><font color="Green" title="E19">A28</font></i>: 
<font color="Maroon" title="c5">IT2</font> <a href="termord.html#R1" title="TERMORD:pred.1">&lt;=</a> <font color="Maroon" title="c4">IT1</font>,<font color="Maroon" title="c2">T</font>
 
<b>by </b><i><a class="txt" href="lexbfs.html#E2:20_1_2"><i><font color="Green" title="E16">A25</font></i></a>, <a class="txt" href="lexbfs.html#E3:20_1_2"><i><font color="Green" title="E17">A26</font></i></a></i>;<br/>
<a NAME="E6:20_1_2"/><i><font color="Green" title="E20">A29</font></i>: 
<font color="Maroon" title="c4">IT1</font> <a href="termord.html#R1" title="TERMORD:pred.1">&lt;=</a> <font color="Maroon" title="c5">IT2</font>,<font color="Maroon" title="c2">T</font>
 
<b>by </b><i><a class="txt" href="lexbfs.html#E1:20_1_2"><i><font color="Green" title="E15">A24</font></i></a>, <a class="txt" href="lexbfs.html#E4:20_1_2"><i><font color="Green" title="E18">A27</font></i></a></i>;<br/>
<b>thus </b><a NAME="E7:20_1_2"/>
<font color="Maroon" title="c4">IT1</font> <a href="pboole.html#R6" title="PBOOLE:pred.6">=</a> <font color="Maroon" title="c5">IT2</font>
 <b>by </b><i><a class="txt" href="lexbfs.html#E5:20_1_2"><i><font color="Green" title="E19">A28</font></i></a>, <a class="txt" href="lexbfs.html#E6:20_1_2"><i><font color="Green" title="E20">A29</font></i></a>, <a class="ref" href="termord.html#T7" title="TERMORD:th.7">TERMORD:7</a></i>;<br/>


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