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<b>let </b><font color="Maroon" title="c1">E</font> be   <a href="funct_1.html#NM1" title="FUNCT_1:NM.1">Function</a>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> ( <font color="Maroon" title="c1">E</font> is <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a> implies <font color="Maroon" title="c1">E</font> is <a href="ordinal1.html#V5" title="ORDINAL1:attr.5">T-Sequence-like</a> )</span><br/>

<b>assume </b><a NAME="E1:47_1_1"/>
<font color="Maroon" title="c1">E</font> is <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> <font color="Maroon" title="c1">E</font> is <a href="ordinal1.html#V5" title="ORDINAL1:attr.5">T-Sequence-like</a></span><br/>

<a NAME="E2:47_1_1"/><b>then </b>
 <a href="relat_1.html#NK2" title="RELAT_1:NK.2">dom</a> <font color="Maroon" title="c1">E</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a> 
 
;<br/>
<b>hence </b><a NAME="E3:47_1_1"/>
<font color="Maroon" title="c1">E</font> is <a href="ordinal1.html#V5" title="ORDINAL1:attr.5">T-Sequence-like</a>
 <b>by </b><i><a class="ref" href="ordinal1.html#D7" target="_self" title="ORDINAL1:def.7">Def7</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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