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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="sub_metr.html#NM1">PseudoMetricSpace</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font>, <font color="Maroon">c<sub>4</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>



<b>assume </b><a NAME="E1:8"/>
( <font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R2">in</a> <font color="Maroon">c<sub>2</sub></font> <a href="metric_2.html#K1" target="_self">-neighbour</a>  &amp; <font color="Maroon">c<sub>4</sub></font> <a href="hidden.html#R2">in</a> <font color="Maroon">c<sub>2</sub></font> <a href="metric_2.html#K1" target="_self">-neighbour</a>  )
 ;<br/>

<a NAME="E2:8"/><b>then </b>
( <font color="Maroon">c<sub>3</sub></font> <a href="metric_2.html#R3" target="_self">tolerates</a> <font color="Maroon">c<sub>2</sub></font> &amp; <font color="Maroon">c<sub>4</sub></font> <a href="metric_2.html#R3" target="_self">tolerates</a> <font color="Maroon">c<sub>2</sub></font> )
 
<b>by </b><i><a class="ref" href="metric_2.html#T7" target="_self">Th7</a></i>;<br/>
<b>hence </b><a NAME="E3:8"/>
<font color="Maroon">c<sub>3</sub></font> <a href="metric_2.html#R3" target="_self">tolerates</a> <font color="Maroon">c<sub>4</sub></font>
 <b>by </b><i><a class="ref" href="metric_2.html#T6" target="_self">Th6</a></i>;<br/>


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