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<b>set </b><font color="Maroon">c<sub>1</sub></font> =  <a href="cat_1.html#K8">1Cat</a> 0,1;<br/>
<b>reconsider </b><font color="Maroon">c<sub>2</sub></font> =  <a href="cat_1.html#K8">1Cat</a> <span class="p1">(<span class="default"><a href="cat_1.html#K8">1Cat</a> 0,1</span>)</span>,<span class="p1"><a href="tarski.html#K4">[</a><span class="default"><span class="p2"><a href="tarski.html#K4">[</a><span class="default"><span class="p3">(<span class="default"><a href="cat_1.html#K8">1Cat</a> 0,1</span>)</span>,<span class="p3">(<span class="default"><a href="cat_1.html#K8">1Cat</a> 0,1</span>)</span></span><a href="tarski.html#K4">]</a></span>,<span class="p2">(<span class="default"><a href="cat_1.html#K15">id</a> <span class="p3">(<span class="default"><a href="cat_1.html#K8">1Cat</a> 0,1</span>)</span></span>)</span></span><a href="tarski.html#K4">]</a></span> as  <a href="cat_1.html#V1">strict</a> <a href="cat_5.html#V3" target="_self">Categorial</a> <a href="cat_1.html#NM4">Category</a> <b>by </b><i><a class="ref" href="cat_5.html#T11" target="_self">Th11</a></i>;<br/>
<b>take </b>
<font color="Maroon">c<sub>2</sub></font>
;<br/>

<b>let </b><font color="Maroon">c<sub>3</sub></font>, <font color="Maroon">c<sub>4</sub></font> be   <a href="cat_1.html#NM4">Category</a>; <i><font color="Red">:: according to </font></i><a class="ref" href="cat_5.html#D8" target="_self">CAT_5:def 8</a><br/>

<b>assume </b><a NAME="E2:41_1_1"/><i><font color="Green">E26</font></i>: 
( <font color="Maroon">c<sub>3</sub></font> is   <a href="cat_1.html#NM1">Object</a> of <font color="Maroon">c<sub>2</sub></font> &amp; <font color="Maroon">c<sub>4</sub></font> is   <a href="cat_1.html#NM1">Object</a> of <font color="Maroon">c<sub>2</sub></font> )
 ;<br/>

<b>let </b><font color="Maroon">c<sub>5</sub></font> be    <a href="cat_1.html#M2">Functor</a> of <font color="Maroon">c<sub>3</sub></font>,<font color="Maroon">c<sub>4</sub></font>;<br/>

<a NAME="E3:41_1_1"/><i><font color="Green">E27</font></i>: 
( <font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R1">=</a>  <a href="cat_1.html#K8">1Cat</a> 0,1 &amp; <font color="Maroon">c<sub>4</sub></font> <a href="hidden.html#R1">=</a>  <a href="cat_1.html#K8">1Cat</a> 0,1 )
 
<b>by </b><i><a class="txt" href="cat_5.html#E2:41_1_1"><i><font color="Green">E26</font></i></a>, <a class="ref" href="tarski.html#D1">TARSKI:def 1</a></i>;<br/>
<a NAME="E4:41_1_1"/>
 <a href="cat_1.html#K15">id</a> <span class="p1">(<span class="default"><a href="cat_1.html#K8">1Cat</a> 0,1</span>)</span> <a href="funct_2.html#R1">=</a> <font color="Maroon">c<sub>5</sub></font>
 
<b>by </b><i><a class="txt" href="cat_5.html#E3:41_1_1"><i><font color="Green">E27</font></i></a>, <a class="ref" href="funct_2.html#T66">FUNCT_2:66</a></i>;<br/>
<b>hence </b><a NAME="E5:41_1_1"/>
<span class="p1"><a href="tarski.html#K4">[</a><span class="default"><span class="p2"><a href="tarski.html#K4">[</a><span class="default"><font color="Maroon">c<sub>3</sub></font>,<font color="Maroon">c<sub>4</sub></font></span><a href="tarski.html#K4">]</a></span>,<font color="Maroon">c<sub>5</sub></font></span><a href="tarski.html#K4">]</a></span> is   <a href="cat_1.html#NM2">Morphism</a> of <font color="Maroon">c<sub>2</sub></font>
 <b>by </b><i><a class="txt" href="cat_5.html#E3:41_1_1"><i><font color="Green">E27</font></i></a>, <a class="ref" href="tarski.html#D1">TARSKI:def 1</a></i>;<br/>


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