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<b>let </b><font color="Maroon" title="c2">G2</font> be    <a href="glib_000.html#M2" title="GLIB_000:mode.2">Subgraph</a> of <font color="Maroon" title="c1">G</font>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> <font color="Maroon" title="c2">G2</font> is <a href="glib_002.html#V2" title="GLIB_002:attr.2">acyclic</a></span><br/>

<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="14_1_1_1"><b>now </b></a><div class="add"><b>given </b><font color="Maroon" title="c3">W2</font> being    <a href="glib_001.html#M3" title="GLIB_001:mode.3">Walk</a> of <font color="Maroon" title="c2">G2</font><b> such that </b><a NAME="E2:14_1_1_1"/><i><font color="Green" title="E6">A1</font></i>: 
<font color="Maroon" title="c3">W2</font> is <a href="glib_001.html#V8" title="GLIB_001:attr.8">Cycle-like</a>
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> contradiction</span><br/><a NAME="E3:14_1_1_1"/><i><font color="Green" title="E7">A2</font></i>: 
( <font color="Maroon" title="c3">W2</font> is <a href="glib_001.html#V1" title="GLIB_001:attr.1">closed</a> &amp; not <font color="Maroon" title="c3">W2</font> is <a href="glib_001.html#V3" title="GLIB_001:attr.3">trivial</a> &amp; <font color="Maroon" title="c3">W2</font> is <a href="glib_001.html#V5" title="GLIB_001:attr.5">Path-like</a> )
 <b>by </b><i><a class="txt" href="#E2:14_1_1_1"><i><font color="Green" title="E6">A1</font></i></a></i>;<br/><b>reconsider </b><font color="Maroon" title="c4">W</font> = <font color="Maroon" title="c3">W2</font> as    <a href="glib_001.html#M3" title="GLIB_001:mode.3">Walk</a> of <font color="Maroon" title="c1">G</font> <b>by </b><i><a class="ref" href="glib_001.html#T168" title="GLIB_001:th.168">GLIB_001:168</a></i>;<br/><a NAME="E5:14_1_1_1"/>
( <font color="Maroon" title="c4">W</font> is <a href="glib_001.html#V1" title="GLIB_001:attr.1">closed</a> &amp; not <font color="Maroon" title="c4">W</font> is <a href="glib_001.html#V3" title="GLIB_001:attr.3">trivial</a> &amp; <font color="Maroon" title="c4">W</font> is <a href="glib_001.html#V5" title="GLIB_001:attr.5">Path-like</a> )
 <b>by </b><i><a class="txt" href="#E3:14_1_1_1"><i><font color="Green" title="E7">A2</font></i></a>, <a class="ref" href="glib_001.html#T177" title="GLIB_001:th.177">GLIB_001:177</a></i>;<br/><a NAME="E6:14_1_1_1"/><b>then </b>
<font color="Maroon" title="c4">W</font> is <a href="glib_001.html#V8" title="GLIB_001:attr.8">Cycle-like</a>
 <b>by </b><i><a class="ref" href="glib_001.html#D31" title="GLIB_001:def.31">GLIB_001:def 31</a></i>;<br/><b>hence </b><a NAME="E7:14_1_1_1"/>
contradiction
 <b>by </b><i><a class="ref" href="glib_002.html#D2" target="_self" title="GLIB_002:def.2">Def2</a></i>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> verum</span><br/></div><b>end;</b></div>
<b>hence </b><a NAME="E2:14_1_1"/>
<font color="Maroon" title="c2">G2</font> is <a href="glib_002.html#V2" title="GLIB_002:attr.2">acyclic</a>
 <b>by </b><i><a class="ref" href="glib_002.html#D2" target="_self" title="GLIB_002:def.2">Def2</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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