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<b>let </b><font color="Maroon">C</font> be   <a href="altcat_1.html#NM4">category</a>;<br/><b>let </b><font color="Maroon">o1</font> be   <a href="altcat_1.html#NM1">object</a> of <font color="Maroon">C</font>;<br/><b>let </b><font color="Maroon">o2</font> be   <a href="altcat_1.html#NM1">object</a> of <font color="Maroon">C</font>;<br/><b>let </b><font color="Maroon">m</font> be   <a href="altcat_1.html#NM2">Morphism</a> of <font color="Maroon">o1</font>,<font color="Maroon">o2</font>, <font color="Maroon">m'</font> be   <a href="altcat_1.html#NM2">Morphism</a> of <font color="Maroon">o1</font>,<font color="Maroon">o2</font>;<br/>







<b>assume </b><b>that </b><br/><a NAME="E1:10"/><i><font color="Green">E24</font></i>: 
<font color="Maroon">m</font> is <a href="altcat_3.html#V9">_zero</a>
 <b>and </b><br/><a NAME="E2:10"/><i><font color="Green">E25</font></i>: 
<font color="Maroon">m'</font> is <a href="altcat_3.html#V9">_zero</a>
 ;<br/>

<b>given </b><font color="Maroon">O</font> being   <a href="altcat_1.html#NM1">object</a> of <font color="Maroon">C</font><b> such that </b><a NAME="E3:10"/><i><font color="Green">E26</font></i>: 
<font color="Maroon">O</font> is <a href="altcat_3.html#V8">_zero</a>
 ;<br/>

<b>consider </b><font color="Maroon">a</font> being   <a href="altcat_1.html#NM2">Morphism</a> of <font color="Maroon">o1</font>,<font color="Maroon">O</font>;<br/>
<b>consider </b><font color="Maroon">b</font> being   <a href="altcat_1.html#NM2">Morphism</a> of <font color="Maroon">O</font>,<font color="Maroon">o2</font>;<br/>
<b>consider </b><font color="Maroon">n</font> being   <a href="altcat_1.html#NM2">Morphism</a> of <font color="Maroon">O</font>,<font color="Maroon">O</font>;<br/>
<b>thus </b><font color="Maroon">m</font> = 
<span class="p1">(<span class="default"><font color="Maroon">b</font> <a href="altcat_1.html#K5">*</a> <span class="p2">(<span class="default"><span class="p3">(<span class="default"><font color="Maroon">n</font> <a href="altcat_3.html#K1">"</a> </span>)</span> <a href="altcat_1.html#K5">*</a> <font color="Maroon">n</font></span>)</span></span>)</span> <a href="altcat_1.html#K5">*</a> <font color="Maroon">a</font>
<b>by </b><i>, , <a class="ref" href="altcat_3.html#D12">ALTCAT_3:def 12</a></i>
<br/>.= 
<font color="Maroon">m'</font>
<b>by </b><i>, , <a class="ref" href="altcat_3.html#D12">ALTCAT_3:def 12</a></i>
;<br/>


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