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<b>let </b><font color="Maroon">D</font> be  non <a href="xboole_0.html#V1">empty</a>  <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">d1</font> be    <a href="subset_1.html#M1">Element</a> of <font color="Maroon">D</font>;<br/><b>let </b><font color="Maroon">d2</font> be    <a href="subset_1.html#M1">Element</a> of <font color="Maroon">D</font>;<br/><b>let </b><font color="Maroon">d3</font> be    <a href="subset_1.html#M1">Element</a> of <font color="Maroon">D</font>;<br/>







<a NAME="E1:15"/>
(  <a href="relat_1.html#K2">rng</a> <span class="p1"><a href="finseq_1.html#K11">&lt;*</a><span class="default"><font color="Maroon">d1</font>,<font color="Maroon">d2</font>,<font color="Maroon">d3</font></span><a href="finseq_1.html#K11">*&gt;</a></span> <a href="hidden.html#R1">=</a> <span class="p1"><a href="domain_1.html#K8">{</a><span class="default"><font color="Maroon">d1</font>,<font color="Maroon">d2</font>,<font color="Maroon">d3</font></span><a href="domain_1.html#K8">}</a></span> &amp; <span class="p1"><a href="domain_1.html#K8">{</a><span class="default"><font color="Maroon">d1</font>,<font color="Maroon">d2</font>,<font color="Maroon">d3</font></span><a href="domain_1.html#K8">}</a></span> <a href="tarski.html#R1">c=</a> <font color="Maroon">D</font> )
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:15"/>
<span class="p1"><a href="finseq_1.html#K11">&lt;*</a><span class="default"><font color="Maroon">d1</font>,<font color="Maroon">d2</font>,<font color="Maroon">d3</font></span><a href="finseq_1.html#K11">*&gt;</a></span> is    <a href="finseq_1.html#M2">FinSequence</a> of <font color="Maroon">D</font>
 <b>by </b><i><a class="ref" href="finseq_1.html#D4">FINSEQ_1:def 4</a></i>;<br/>


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