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<b>let </b><font color="Maroon">b</font> be   <a href="polynom1.html#NM1">bag</a> of <font color="Maroon">X</font>;<br/>

<b>assume </b><a NAME="E1:12_1_1"/>
<font color="Maroon">b</font> is <a href="polynom7.html#V2" target="_self">univariate</a>
 ;<br/>

<b>then consider </b><font color="Maroon">x</font> being    <a href="subset_1.html#M1">Element</a> of <font color="Maroon">X</font><b> such that </b><br/><a NAME="E3:12_1_1"/><i><font color="Green">E27</font></i>: 
 <a href="polynom2.html#K1">support</a> <font color="Maroon">b</font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="domain_1.html#K6">{</a><span class="default"><font color="Maroon">x</font></span><a href="domain_1.html#K6">}</a></span>
 <b>by </b><i/>;<br/>
<a NAME="E4:12_1_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a>  <a href="polynom2.html#K1">support</a> <font color="Maroon">b</font>
 
<b>by </b><i>, <a class="ref" href="tarski.html#D1">TARSKI:def 1</a></i>;<br/>
<a NAME="E5:12_1_1"/><b>then </b>
<font color="Maroon">b</font> <a href="polynom1.html#K8">.</a> <font color="Maroon">x</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> 0
 
<b>by </b><i><a class="ref" href="polynom1.html#D7">POLYNOM1:def 7</a></i>;<br/>
<a NAME="E6:12_1_1"/><b>then </b>
<font color="Maroon">b</font> <a href="polynom1.html#K8">.</a> <font color="Maroon">x</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> <span class="p1">(<span class="default"><a href="polynom1.html#K16">EmptyBag</a> <font color="Maroon">X</font></span>)</span> <a href="polynom1.html#K8">.</a> <font color="Maroon">x</font>
 
<b>by </b><i><a class="ref" href="polynom1.html#T56">POLYNOM1:56</a></i>;<br/>
<b>hence </b><a NAME="E7:12_1_1"/>
not <font color="Maroon">b</font> is <a href="polynom2.html#V1">empty</a>
 <b>by </b><i><a class="ref" href="polynom2.html#D1">POLYNOM2:def 1</a></i>;<br/>


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