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<b>let </b><font color="Maroon">a</font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font>; <i><font color="Red">:: according to </font></i><a class="ref" href="polyalg1.html#D1" target="_self">POLYALG1:def 1</a><br/><b>let </b><font color="Maroon">x</font> be   <a href="struct_0.html#NM1">Element</a> of <span class="p1">(<span class="default"><a href="polyalg1.html#K1" target="_self">Formal-Series</a> <font color="Maroon">L</font></span>)</span>, <font color="Maroon">y</font> be   <a href="struct_0.html#NM1">Element</a> of <span class="p1">(<span class="default"><a href="polyalg1.html#K1" target="_self">Formal-Series</a> <font color="Maroon">L</font></span>)</span>;<br/>



<b>reconsider </b><font color="Maroon">x1</font> = <font color="Maroon">x</font>, <font color="Maroon">y1</font> = <font color="Maroon">y</font> as   <a href="struct_0.html#NM1">Element</a> of <span class="p1">(<span class="default"><a href="polyalg1.html#K1" target="_self">Formal-Series</a> <font color="Maroon">L</font></span>)</span> ;<br/>
<b>reconsider </b><font color="Maroon">p</font> = <font color="Maroon">x1</font>, <font color="Maroon">q</font> = <font color="Maroon">y1</font> as   <a href="normsp_1.html#NM2">sequence</a> of <font color="Maroon">L</font> <b>by </b><i/>;<br/>
<a NAME="E3:29_1_1"/><i><font color="Green">E31</font></i>: 
<font color="Maroon">a</font> <a href="vectsp_1.html#K6">*</a> <font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">a</font> <a href="polynom5.html#K3">*</a> <font color="Maroon">p</font>
 
<b>by </b><i/>;<br/>
<a NAME="E4:29_1_1"/>
<font color="Maroon">x</font> <a href="group_1.html#K1">*</a> <font color="Maroon">y</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="polynom3.html#K14">*'</a> <font color="Maroon">q</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><font color="Maroon">a</font> <a href="vectsp_1.html#K6">*</a> <span class="p1">(<span class="default"><font color="Maroon">x</font> <a href="group_1.html#K1">*</a> <font color="Maroon">y</font></span>)</span> = 
<font color="Maroon">a</font> <a href="polynom5.html#K3">*</a> <span class="p1">(<span class="default"><font color="Maroon">p</font> <a href="polynom3.html#K14">*'</a> <font color="Maroon">q</font></span>)</span>
<b>by </b><i/>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon">a</font> <a href="polynom5.html#K3">*</a> <font color="Maroon">p</font></span>)</span> <a href="polynom3.html#K14">*'</a> <font color="Maroon">q</font>
<b>by </b><i/>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon">a</font> <a href="vectsp_1.html#K6">*</a> <font color="Maroon">x</font></span>)</span> <a href="group_1.html#K1">*</a> <font color="Maroon">y</font>
<b>by </b><i>, </i>
;<br/><br/>


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