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<b>consider </b><font color="Maroon">c<sub>1</sub></font> being  non <a href="struct_0.html#V3">empty</a> <a href="altcat_1.html#V2">transitive</a> <a href="altcat_1.html#V6">strict</a> <a href="altcat_1.html#V11">associative</a> <a href="altcat_1.html#V12">with_units</a>  <a href="altcat_1.html#L2">AltCatStr</a> ;<br/>
<b>take </b>
<font color="Maroon">c<sub>1</sub></font>
;<br/>

<b>thus </b><a NAME="E2:1_1_1"/>
( <font color="Maroon">c<sub>1</sub></font> is <a href="altcat_1.html#V2">transitive</a> &amp; <font color="Maroon">c<sub>1</sub></font> is <a href="altcat_1.html#V11">associative</a> &amp; <font color="Maroon">c<sub>1</sub></font> is <a href="altcat_1.html#V12">with_units</a> &amp; <font color="Maroon">c<sub>1</sub></font> is <a href="altcat_1.html#V6">strict</a> )
 ;<br/>


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