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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="prelamb.html#NM5">SynTypes_Calculus</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="prelamb.html#NM1">type</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>







<a NAME="E1:69"/>
( <span class="p1"><a href="finseq_1.html#K12">&lt;*</a><span class="default"><font color="Maroon">c<sub>2</sub></font></span><a href="finseq_1.html#K12">*&gt;</a></span> <a href="prelamb.html#R2" target="_self">==&gt;.</a> <font color="Maroon">c<sub>2</sub></font> &amp; <span class="p1"><a href="finseq_1.html#K12">&lt;*</a><span class="default"><font color="Maroon">c<sub>3</sub></font></span><a href="finseq_1.html#K12">*&gt;</a></span> <a href="prelamb.html#R2" target="_self">==&gt;.</a> <font color="Maroon">c<sub>3</sub></font> &amp; <span class="p1"><a href="finseq_1.html#K12">&lt;*</a><span class="default"><font color="Maroon">c<sub>4</sub></font></span><a href="finseq_1.html#K12">*&gt;</a></span> <a href="prelamb.html#R2" target="_self">==&gt;.</a> <font color="Maroon">c<sub>4</sub></font> )
 
<b>by </b><i><a class="ref" href="prelamb.html#D19" target="_self">Def19</a></i>;<br/>
<a NAME="E2:69"/><b>then </b>
( <span class="p1"><a href="finseq_1.html#K12">&lt;*</a><span class="default"><font color="Maroon">c<sub>2</sub></font></span><a href="finseq_1.html#K12">*&gt;</a></span> <a href="finseq_1.html#K8">^</a> <span class="p1"><a href="finseq_1.html#K12">&lt;*</a><span class="default"><font color="Maroon">c<sub>3</sub></font></span><a href="finseq_1.html#K12">*&gt;</a></span> <a href="prelamb.html#R2" target="_self">==&gt;.</a> <font color="Maroon">c<sub>2</sub></font> <a href="prelamb.html#K3" target="_self">*</a> <font color="Maroon">c<sub>3</sub></font> &amp; <span class="p1"><a href="finseq_1.html#K12">&lt;*</a><span class="default"><font color="Maroon">c<sub>4</sub></font></span><a href="finseq_1.html#K12">*&gt;</a></span> <a href="prelamb.html#R2" target="_self">==&gt;.</a> <font color="Maroon">c<sub>4</sub></font> )
 
<b>by </b><i><a class="ref" href="prelamb.html#D19" target="_self">Def19</a></i>;<br/>
<a NAME="E3:69"/><b>then </b>
<span class="p1">(<span class="default"><span class="p2"><a href="finseq_1.html#K12">&lt;*</a><span class="default"><font color="Maroon">c<sub>2</sub></font></span><a href="finseq_1.html#K12">*&gt;</a></span> <a href="finseq_1.html#K8">^</a> <span class="p2"><a href="finseq_1.html#K12">&lt;*</a><span class="default"><span class="p3">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="prelamb.html#K2" target="_self">/"</a> <font color="Maroon">c<sub>4</sub></font></span>)</span></span><a href="finseq_1.html#K12">*&gt;</a></span></span>)</span> <a href="finseq_1.html#K8">^</a> <span class="p1"><a href="finseq_1.html#K12">&lt;*</a><span class="default"><font color="Maroon">c<sub>4</sub></font></span><a href="finseq_1.html#K12">*&gt;</a></span> <a href="prelamb.html#R2" target="_self">==&gt;.</a> <font color="Maroon">c<sub>2</sub></font> <a href="prelamb.html#K3" target="_self">*</a> <font color="Maroon">c<sub>3</sub></font>
 
<b>by </b><i><a class="txt" href="prelamb.html#E36"><i><font color="Green">Lemma14</font></i></a></i>;<br/>
<a NAME="E4:69"/><b>then </b>
<span class="p1"><a href="finseq_1.html#K12">&lt;*</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="prelamb.html#K3" target="_self">*</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="prelamb.html#K2" target="_self">/"</a> <font color="Maroon">c<sub>4</sub></font></span>)</span></span>)</span></span><a href="finseq_1.html#K12">*&gt;</a></span> <a href="finseq_1.html#K8">^</a> <span class="p1"><a href="finseq_1.html#K12">&lt;*</a><span class="default"><font color="Maroon">c<sub>4</sub></font></span><a href="finseq_1.html#K12">*&gt;</a></span> <a href="prelamb.html#R2" target="_self">==&gt;.</a> <font color="Maroon">c<sub>2</sub></font> <a href="prelamb.html#K3" target="_self">*</a> <font color="Maroon">c<sub>3</sub></font>
 
<b>by </b><i><a class="txt" href="prelamb.html#E42"><i><font color="Green">Lemma20</font></i></a></i>;<br/>
<b>hence </b><a NAME="E5:69"/>
<span class="p1"><a href="finseq_1.html#K12">&lt;*</a><span class="default"><span class="p2">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="prelamb.html#K3" target="_self">*</a> <span class="p3">(<span class="default"><font color="Maroon">c<sub>3</sub></font> <a href="prelamb.html#K2" target="_self">/"</a> <font color="Maroon">c<sub>4</sub></font></span>)</span></span>)</span></span><a href="finseq_1.html#K12">*&gt;</a></span> <a href="prelamb.html#R2" target="_self">==&gt;.</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="prelamb.html#K3" target="_self">*</a> <font color="Maroon">c<sub>3</sub></font></span>)</span> <a href="prelamb.html#K2" target="_self">/"</a> <font color="Maroon">c<sub>4</sub></font>
 <b>by </b><i><a class="ref" href="prelamb.html#D19" target="_self">Def19</a></i>;<br/>


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