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<b>let </b><font color="Maroon" title="c1">D</font> be  non <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>  <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> for <font color="Olive" title="b1">f</font>, <font color="Olive" title="b2">CR</font> being   <a href="filerec1.html#NM1" title="FILEREC1:NM.1">File</a> of <font color="Maroon" title="c1">D</font> holds  <font color="Olive" title="b2">CR</font> <a href="finseq_8.html#R2" title="FINSEQ_8:pred.2">is_substring_of</a>  <a href="finseq_8.html#K8" title="FINSEQ_8:func.8">addcr</a> <font color="Olive" title="b1">f</font>,<font color="Olive" title="b2">CR</font>,1</span><br/><b>let </b><font color="Maroon" title="c2">f</font>, <font color="Maroon" title="c3">CR</font> be    <a href="filerec1.html#NM1" title="FILEREC1:NM.1">File</a> of <font color="Maroon" title="c1">D</font>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> <font color="Maroon" title="c3">CR</font> <a href="finseq_8.html#R2" title="FINSEQ_8:pred.2">is_substring_of</a>  <a href="finseq_8.html#K8" title="FINSEQ_8:func.8">addcr</a> <font color="Maroon" title="c2">f</font>,<font color="Maroon" title="c3">CR</font>,1</span><br/>



<a NAME="E1:42"/>
 <a href="finseq_8.html#K8" title="FINSEQ_8:func.8">addcr</a> <font color="Maroon" title="c2">f</font>,<font color="Maroon" title="c3">CR</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="finseq_8.html#K4" title="FINSEQ_8:func.4">ovlcon</a> <font color="Maroon" title="c2">f</font>,<font color="Maroon" title="c3">CR</font>
 
<b>by </b><i><a class="ref" href="finseq_8.html#D11" title="FINSEQ_8:def.11">FINSEQ_8:def 11</a></i>;<br/>
<b>hence </b><a NAME="E2:42"/>
<font color="Maroon" title="c3">CR</font> <a href="finseq_8.html#R2" title="FINSEQ_8:pred.2">is_substring_of</a>  <a href="finseq_8.html#K8" title="FINSEQ_8:func.8">addcr</a> <font color="Maroon" title="c2">f</font>,<font color="Maroon" title="c3">CR</font>,1
 <b>by </b><i><a class="ref" href="filerec1.html#T40" target="_self" title="FILEREC1:th.40">Th40</a></i>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> verum</span><br/>


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