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<b>let </b><font color="Maroon" title="c1">seq</font> be   <a href="seq_1.html#NM1" title="SEQ_1:NM.1">Real_Sequence</a>;<br/>

<b>assume </b><a NAME="E1:73"/>
<font color="Maroon" title="c1">seq</font> is <a href="relat_1.html#V2" title="RELAT_1:attr.2">being_not_0</a>
 ;<br/>

<a NAME="E2:73"/><b>then </b>
<span class="p1">(<span class="default"><a href="real_1.html#K1" title="REAL_1:func.1">-</a> 1</span>)</span> <a href="seq_1.html#K14" title="SEQ_1:func.14">(#)</a> <font color="Maroon" title="c1">seq</font> is <a href="relat_1.html#V2" title="RELAT_1:attr.2">being_not_0</a>
 
<b>by </b><i><a class="ref" href="seq_1.html#T52" target="_self" title="SEQ_1:th.52">Th52</a></i>;<br/>
<b>hence </b><a NAME="E3:73"/>
 <a href="seq_1.html#K17" title="SEQ_1:func.17">-</a> <font color="Maroon" title="c1">seq</font> is <a href="relat_1.html#V2" title="RELAT_1:attr.2">being_not_0</a>
 <b>by </b><i><a class="ref" href="seq_1.html#T25" target="_self" title="SEQ_1:th.25">Th25</a></i>;<br/>


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