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<b>set </b><font color="Maroon">i</font> =  <a href="grcat_1.html#K12" target="_self">ZERO</a> <font color="Maroon">G</font>,<font color="Maroon">H</font>;<br/>
<a NAME="E1:40_1_1"/><i><font color="Green">E29</font></i>: 
(  <a href="grcat_1.html#K9" target="_self">dom</a> <span class="p1">(<span class="default"><a href="grcat_1.html#K12" target="_self">ZERO</a> <font color="Maroon">G</font>,<font color="Maroon">H</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">G</font> &amp;  <a href="grcat_1.html#K10" target="_self">cod</a> <span class="p1">(<span class="default"><a href="grcat_1.html#K12" target="_self">ZERO</a> <font color="Maroon">G</font>,<font color="Maroon">H</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">H</font> &amp;  <a href="grcat_1.html#K11" target="_self">fun</a> <span class="p1">(<span class="default"><a href="grcat_1.html#K12" target="_self">ZERO</a> <font color="Maroon">G</font>,<font color="Maroon">H</font></span>)</span> <a href="funct_2.html#R1">=</a>  <a href="grcat_1.html#K8" target="_self">ZeroMap</a> <font color="Maroon">G</font>,<font color="Maroon">H</font> )
 
;<br/>
<a NAME="E2:40_1_1"/>
 <a href="grcat_1.html#K8" target="_self">ZeroMap</a> <font color="Maroon">G</font>,<font color="Maroon">H</font> is <a href="grcat_1.html#V1" target="_self">additive</a>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E3:40_1_1"/>
 <a href="grcat_1.html#K12" target="_self">ZERO</a> <font color="Maroon">G</font>,<font color="Maroon">H</font> is  <a href="grcat_1.html#V2" target="_self">strict</a>  <a href="grcat_1.html#M1" target="_self">Morphism</a> of <font color="Maroon">G</font>,<font color="Maroon">H</font>
 <b>by </b><i>, </i>;<br/>


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