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the <a href="functor0.html#U1" title="FUNCTOR0:sel.1">ObjectMap</a> of <font color="Maroon" title="c4">F</font> is <a href="functor0.html#V2" title="FUNCTOR0:attr.2">Contravariant</a>
 
<b>by </b><i><a class="ref" href="functor0.html#D14" target="_self" title="FUNCTOR0:def.14">Def14</a></i>;<br/>
<b>then consider </b><font color="Maroon" title="c6">f</font> being   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c1">C1</font>,the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c2">C2</font><b> such that </b><br/><a NAME="E3:96_1_1"/><i><font color="Green" title="E63">A1</font></i>: 
the <a href="functor0.html#U1" title="FUNCTOR0:sel.1">ObjectMap</a> of <font color="Maroon" title="c4">F</font> <a href="funct_2.html#R2" title="FUNCT_2:pred.2">=</a>  <a href="functor0.html#K1" title="FUNCTOR0:func.1">~</a> <span class="p1"><a href="funct_3.html#K16" title="FUNCT_3:func.16">[:</a><span class="default"><font color="Maroon" title="c6">f</font>,<font color="Maroon" title="c6">f</font></span><a href="funct_3.html#K16" title="FUNCT_3:func.16">:]</a></span>
 <b>by </b><i><a class="ref" href="functor0.html#D3" target="_self" title="FUNCTOR0:def.3">Def3</a></i>;<br/>
<a NAME="E4:96_1_1"/>
the <a href="functor0.html#U1" title="FUNCTOR0:sel.1">ObjectMap</a> of <font color="Maroon" title="c5">G</font> is <a href="functor0.html#V2" title="FUNCTOR0:attr.2">Contravariant</a>
 
<b>by </b><i><a class="ref" href="functor0.html#D14" target="_self" title="FUNCTOR0:def.14">Def14</a></i>;<br/>
<b>then consider </b><font color="Maroon" title="c7">g</font> being   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c2">C2</font>,the <a href="struct_0.html#U1" title="STRUCT_0:sel.1">carrier</a> of <font color="Maroon" title="c3">C3</font><b> such that </b><br/><a NAME="E6:96_1_1"/><i><font color="Green" title="E64">A2</font></i>: 
the <a href="functor0.html#U1" title="FUNCTOR0:sel.1">ObjectMap</a> of <font color="Maroon" title="c5">G</font> <a href="funct_2.html#R2" title="FUNCT_2:pred.2">=</a>  <a href="functor0.html#K1" title="FUNCTOR0:func.1">~</a> <span class="p1"><a href="funct_3.html#K16" title="FUNCT_3:func.16">[:</a><span class="default"><font color="Maroon" title="c7">g</font>,<font color="Maroon" title="c7">g</font></span><a href="funct_3.html#K16" title="FUNCT_3:func.16">:]</a></span>
 <b>by </b><i><a class="ref" href="functor0.html#D3" target="_self" title="FUNCTOR0:def.3">Def3</a></i>;<br/>
<b>take </b>
<font color="Maroon" title="c7">g</font> <a href="partfun1.html#K1" title="PARTFUN1:func.1">*</a> <font color="Maroon" title="c6">f</font>
; <i><font color="Red">:: according to </font></i><a class="ref" href="functor0.html#D2" target="_self" title="FUNCTOR0:def.2">FUNCTOR0:def 2</a>,<a class="ref" href="functor0.html#D13" target="_self" title="FUNCTOR0:def.13">FUNCTOR0:def 13</a><br/>

<b>thus </b>the <a href="functor0.html#U1" title="FUNCTOR0:sel.1">ObjectMap</a> of <span class="p1">(<span class="default"><font color="Maroon" title="c5">G</font> <a href="functor0.html#K13" title="FUNCTOR0:func.13">*</a> <font color="Maroon" title="c4">F</font></span>)</span> = 
the <a href="functor0.html#U1" title="FUNCTOR0:sel.1">ObjectMap</a> of <font color="Maroon" title="c5">G</font> <a href="partfun1.html#K1" title="PARTFUN1:func.1">*</a> the <a href="functor0.html#U1" title="FUNCTOR0:sel.1">ObjectMap</a> of <font color="Maroon" title="c4">F</font>
<b>by </b><i><a class="ref" href="functor0.html#D37" target="_self" title="FUNCTOR0:def.37">Def37</a></i>
<br/>.= 
 <a href="functor0.html#K1" title="FUNCTOR0:func.1">~</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="functor0.html#K1" title="FUNCTOR0:func.1">~</a> <span class="p3"><a href="funct_3.html#K16" title="FUNCT_3:func.16">[:</a><span class="default"><font color="Maroon" title="c7">g</font>,<font color="Maroon" title="c7">g</font></span><a href="funct_3.html#K16" title="FUNCT_3:func.16">:]</a></span></span>)</span> <a href="partfun1.html#K1" title="PARTFUN1:func.1">*</a> <span class="p2"><a href="funct_3.html#K16" title="FUNCT_3:func.16">[:</a><span class="default"><font color="Maroon" title="c6">f</font>,<font color="Maroon" title="c6">f</font></span><a href="funct_3.html#K16" title="FUNCT_3:func.16">:]</a></span></span>)</span>
<b>by </b><i><a class="txt" href="functor0.html#E3:96_1_1"><i><font color="Green" title="E63">A1</font></i></a>, <a class="txt" href="functor0.html#E6:96_1_1"><i><font color="Green" title="E64">A2</font></i></a>, <a class="ref" href="altcat_2.html#T2" title="ALTCAT_2:th.2">ALTCAT_2:2</a></i>
<br/>.= 
 <a href="functor0.html#K1" title="FUNCTOR0:func.1">~</a> <span class="p1">(<span class="default"><a href="functor0.html#K1" title="FUNCTOR0:func.1">~</a> <span class="p2">(<span class="default"><span class="p3"><a href="funct_3.html#K16" title="FUNCT_3:func.16">[:</a><span class="default"><font color="Maroon" title="c7">g</font>,<font color="Maroon" title="c7">g</font></span><a href="funct_3.html#K16" title="FUNCT_3:func.16">:]</a></span> <a href="partfun1.html#K1" title="PARTFUN1:func.1">*</a> <span class="p3"><a href="funct_3.html#K16" title="FUNCT_3:func.16">[:</a><span class="default"><font color="Maroon" title="c6">f</font>,<font color="Maroon" title="c6">f</font></span><a href="funct_3.html#K16" title="FUNCT_3:func.16">:]</a></span></span>)</span></span>)</span>
<b>by </b><i><a class="ref" href="altcat_2.html#T3" title="ALTCAT_2:th.3">ALTCAT_2:3</a></i>
<br/>.= 
<span class="p1"><a href="funct_3.html#K16" title="FUNCT_3:func.16">[:</a><span class="default"><font color="Maroon" title="c7">g</font>,<font color="Maroon" title="c7">g</font></span><a href="funct_3.html#K16" title="FUNCT_3:func.16">:]</a></span> <a href="partfun1.html#K1" title="PARTFUN1:func.1">*</a> <span class="p1"><a href="funct_3.html#K16" title="FUNCT_3:func.16">[:</a><span class="default"><font color="Maroon" title="c6">f</font>,<font color="Maroon" title="c6">f</font></span><a href="funct_3.html#K16" title="FUNCT_3:func.16">:]</a></span>
<b>by </b><i><a class="ref" href="funct_4.html#T54" title="FUNCT_4:th.54">FUNCT_4:54</a></i>
<br/>.= 
<span class="p1"><a href="funct_3.html#K16" title="FUNCT_3:func.16">[:</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon" title="c7">g</font> <a href="partfun1.html#K1" title="PARTFUN1:func.1">*</a> <font color="Maroon" title="c6">f</font></span>)</span>,<span class="p2">(<span class="default"><font color="Maroon" title="c7">g</font> <a href="partfun1.html#K1" title="PARTFUN1:func.1">*</a> <font color="Maroon" title="c6">f</font></span>)</span></span><a href="funct_3.html#K16" title="FUNCT_3:func.16">:]</a></span>
<b>by </b><i><a class="ref" href="funct_3.html#T92" title="FUNCT_3:th.92">FUNCT_3:92</a></i>
;<br/>


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