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<b>let </b><font color="Maroon">C</font> be   <a href="cat_1.html#NM4">Category</a>;<br/><b>let </b><font color="Maroon">B</font> be   <a href="cat_1.html#NM4">Category</a>;<br/><b>let </b><font color="Maroon">D</font> be   <a href="cat_1.html#NM4">Category</a>;<br/><b>let </b><font color="Maroon">S1</font> be    <a href="cat_1.html#M2">Functor</a> of <font color="Maroon">C</font>,<font color="Maroon">B</font>;<br/><b>let </b><font color="Maroon">S2</font> be    <a href="oppcat_1.html#M1" target="_self">Contravariant_Functor</a> of <font color="Maroon">B</font>,<font color="Maroon">D</font>;<br/>









<a NAME="E1:80"/>
 <a href="oppcat_1.html#K8" target="_self">*'</a> <font color="Maroon">S1</font> is    <a href="oppcat_1.html#M1" target="_self">Contravariant_Functor</a> of <font color="Maroon">C</font> <a href="oppcat_1.html#K2" target="_self">opp</a> ,<font color="Maroon">B</font>
 
<b>by </b><i/>;<br/>
<a NAME="E2:80"/><b>then </b>
<font color="Maroon">S2</font> <a href="partfun1.html#K1">*</a> <span class="p1">(<span class="default"><a href="oppcat_1.html#K8" target="_self">*'</a> <font color="Maroon">S1</font></span>)</span> is    <a href="cat_1.html#M2">Functor</a> of <font color="Maroon">C</font> <a href="oppcat_1.html#K2" target="_self">opp</a> ,<font color="Maroon">D</font>
 
<b>by </b><i/>;<br/>
<a NAME="E3:80"/><b>then </b>
 <a href="oppcat_1.html#K7" target="_self">/*</a> <span class="p1">(<span class="default"><font color="Maroon">S2</font> <a href="partfun1.html#K1">*</a> <span class="p2">(<span class="default"><a href="oppcat_1.html#K8" target="_self">*'</a> <font color="Maroon">S1</font></span>)</span></span>)</span> is    <a href="oppcat_1.html#M1" target="_self">Contravariant_Functor</a> of <font color="Maroon">C</font>,<font color="Maroon">D</font>
 
<b>by </b><i/>;<br/>
<a NAME="E4:80"/><b>then </b>
<font color="Maroon">S2</font> <a href="partfun1.html#K1">*</a> <span class="p1">(<span class="default"><a href="oppcat_1.html#K7" target="_self">/*</a> <span class="p2">(<span class="default"><a href="oppcat_1.html#K8" target="_self">*'</a> <font color="Maroon">S1</font></span>)</span></span>)</span> is    <a href="oppcat_1.html#M1" target="_self">Contravariant_Functor</a> of <font color="Maroon">C</font>,<font color="Maroon">D</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E5:80"/>
<font color="Maroon">S2</font> <a href="partfun1.html#K1">*</a> <font color="Maroon">S1</font> is    <a href="oppcat_1.html#M1" target="_self">Contravariant_Functor</a> of <font color="Maroon">C</font>,<font color="Maroon">D</font>
 <b>by </b><i/>;<br/>


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