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<b>let </b><font color="Maroon" title="c3">A</font> be  non <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a> <a href="altcat_1.html#V2" title="ALTCAT_1:attr.2">transitive</a> <a href="altcat_1.html#V12" title="ALTCAT_1:attr.12">with_units</a>  <a href="altcat_1.html#L2" title="ALTCAT_1:struct.2">AltCatStr</a> ; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide">  ex <font color="Olive" title="b1">F</font> being   <a href="functor0.html#M2" title="FUNCTOR0:mode.2">Functor</a> of <font color="Maroon" title="c3">A</font>,<font color="Maroon" title="c3">A</font> st <br/>( <font color="Olive" title="b1">F</font> is <a href="functor0.html#V21" title="FUNCTOR0:attr.21">bijective</a> &amp; <font color="Olive" title="b1">F</font> is <a href="functor0.html#V15" title="FUNCTOR0:attr.15">covariant</a> )</span><br/>

<b>take </b>
 <a href="functor0.html#K12" title="FUNCTOR0:func.12">id</a> <font color="Maroon" title="c3">A</font>
; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> (  <a href="functor0.html#K12" title="FUNCTOR0:func.12">id</a> <font color="Maroon" title="c3">A</font> is <a href="functor0.html#V21" title="FUNCTOR0:attr.21">bijective</a> &amp;  <a href="functor0.html#K12" title="FUNCTOR0:func.12">id</a> <font color="Maroon" title="c3">A</font> is <a href="functor0.html#V15" title="FUNCTOR0:attr.15">covariant</a> )</span><br/>

<b>thus </b><a NAME="E1:123_1_1"/>
(  <a href="functor0.html#K12" title="FUNCTOR0:func.12">id</a> <font color="Maroon" title="c3">A</font> is <a href="functor0.html#V21" title="FUNCTOR0:attr.21">bijective</a> &amp;  <a href="functor0.html#K12" title="FUNCTOR0:func.12">id</a> <font color="Maroon" title="c3">A</font> is <a href="functor0.html#V15" title="FUNCTOR0:attr.15">covariant</a> )
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> verum</span><br/>


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