<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="altcat_1.html#NM4">category</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font> be   <a href="altcat_1.html#NM1">object</a> of <font color="Maroon">c<sub>1</sub></font>;<br/><b>let </b><font color="Maroon">c<sub>4</sub></font>, <font color="Maroon">c<sub>5</sub></font> be   <a href="altcat_1.html#NM2">Morphism</a> of <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>3</sub></font>;<br/>







<b>assume </b><b>that </b><br/><a NAME="E1:10"/><i><font color="Green">E5</font></i>: 
<font color="Maroon">c<sub>4</sub></font> is <a href="altcat_3.html#V9">_zero</a>
 <b>and </b><br/><a NAME="E2:10"/><i><font color="Green">E6</font></i>: 
<font color="Maroon">c<sub>5</sub></font> is <a href="altcat_3.html#V9">_zero</a>
 ;<br/>

<b>given </b><font color="Maroon">c<sub>6</sub></font> being   <a href="altcat_1.html#NM1">object</a> of <font color="Maroon">c<sub>1</sub></font><b> such that </b><a NAME="E3:10"/><i><font color="Green">E7</font></i>: 
<font color="Maroon">c<sub>6</sub></font> is <a href="altcat_3.html#V8">_zero</a>
 ;<br/>

<b>consider </b><font color="Maroon">c<sub>7</sub></font> being   <a href="altcat_1.html#NM2">Morphism</a> of <font color="Maroon">c<sub>2</sub></font>,<font color="Maroon">c<sub>6</sub></font>;<br/>
<b>consider </b><font color="Maroon">c<sub>8</sub></font> being   <a href="altcat_1.html#NM2">Morphism</a> of <font color="Maroon">c<sub>6</sub></font>,<font color="Maroon">c<sub>3</sub></font>;<br/>
<b>consider </b><font color="Maroon">c<sub>9</sub></font> being   <a href="altcat_1.html#NM2">Morphism</a> of <font color="Maroon">c<sub>6</sub></font>,<font color="Maroon">c<sub>6</sub></font>;<br/>
<b>thus </b><font color="Maroon">c<sub>4</sub></font> = 
<span class="p1">(<span class="default"><font color="Maroon">c<sub>8</sub></font> <a href="altcat_1.html#K5">*</a> <span class="p2">(<span class="default"><span class="p3">(<span class="default"><font color="Maroon">c<sub>9</sub></font> <a href="altcat_3.html#K1">"</a> </span>)</span> <a href="altcat_1.html#K5">*</a> <font color="Maroon">c<sub>9</sub></font></span>)</span></span>)</span> <a href="altcat_1.html#K5">*</a> <font color="Maroon">c<sub>7</sub></font>
<b>by </b><i><a class="txt" href="altcat_4.html#E1:10"><i><font color="Green">E5</font></i></a>, <a class="txt" href="altcat_4.html#E3:10"><i><font color="Green">E7</font></i></a>, <a class="ref" href="altcat_3.html#D12">ALTCAT_3:def 12</a></i>
<br/>.= 
<font color="Maroon">c<sub>5</sub></font>
<b>by </b><i><a class="txt" href="altcat_4.html#E2:10"><i><font color="Green">E6</font></i></a>, <a class="txt" href="altcat_4.html#E3:10"><i><font color="Green">E7</font></i></a>, <a class="ref" href="altcat_3.html#D12">ALTCAT_3:def 12</a></i>
;<br/>


</div>
