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<b>defpred </b><font color="Maroon">S<sub>1</sub></font>[   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ,   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ,   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ] <b>means </b>( ( $2 is    <a href="glib_005.html#M1" title="GLIB_005:mode.1">AP:VLabeling</a> of <font color="Maroon" title="c2">EL</font> &amp;  ex <font color="Olive" title="b1">Gn</font>, <font color="Olive" title="b2">Gn1</font> being   <a href="glib_005.html#M1" title="GLIB_005:mode.1">AP:VLabeling</a> of <font color="Maroon" title="c2">EL</font> st <br/>( $2 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b1">Gn</font> &amp; $3 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b2">Gn1</font> &amp; <font color="Olive" title="b2">Gn1</font> <a href="relset_1.html#R2" title="RELSET_1:pred.2">=</a>  <a href="glib_005.html#K3" title="GLIB_005:func.3">AP:Step</a> <font color="Olive" title="b1">Gn</font> ) ) or ( $2 is  not    <a href="glib_005.html#M1" title="GLIB_005:mode.1">AP:VLabeling</a> of <font color="Maroon" title="c2">EL</font> &amp; $2 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> $3 ) );<br/>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="24_1_1_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon" title="c4">n</font>, <font color="Maroon" title="c5">x</font> be    <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">  ex <font color="Olive" title="b1">y</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>  st <font color="Maroon">S<sub>1</sub></font>[<font color="Maroon" title="c4">n</font>,<font color="Maroon" title="c5">x</font>,<font color="Olive" title="b1">y</font>]</span><br/><div><a class="txt" onclick="hs2(this)" href="javascript:()" title="24_1_1_1_1"><b>now </b></a><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="24_1_1_1_1_1"><b>per </b></a><a class="txt" onclick="hs(this)" href="javascript:()"><b>cases </b></a><span class="hide"><a NAME="E1:24_1_1_1_1_1"/>
( <font color="Maroon" title="c5">x</font> is    <a href="glib_005.html#M1" title="GLIB_005:mode.1">AP:VLabeling</a> of <font color="Maroon" title="c2">EL</font> or  not <font color="Maroon" title="c5">x</font> is    <a href="glib_005.html#M1" title="GLIB_005:mode.1">AP:VLabeling</a> of <font color="Maroon" title="c2">EL</font> )
 </span>;<br/><div class="add"><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="24_1_1_1_1_1_1"><b>suppose </b></a><a NAME="E1:24_1_1_1_1_1_1"/>
<font color="Maroon" title="c5">x</font> is    <a href="glib_005.html#M1" title="GLIB_005:mode.1">AP:VLabeling</a> of <font color="Maroon" title="c2">EL</font>
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide">  ex <font color="Olive" title="b1">y</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>  st <font color="Maroon">S<sub>1</sub></font>[<font color="Maroon" title="c4">n</font>,<font color="Maroon" title="c5">x</font>,<font color="Olive" title="b1">y</font>]</span><br/><div class="add"><b>then reconsider </b><font color="Maroon" title="c6">Gn</font> = <font color="Maroon" title="c5">x</font> as    <a href="glib_005.html#M1" title="GLIB_005:mode.1">AP:VLabeling</a> of <font color="Maroon" title="c2">EL</font> ;<br/><a NAME="E3:24_1_1_1_1_1_1"/>
<font color="Maroon">S<sub>1</sub></font>[<font color="Maroon" title="c4">n</font>,<font color="Maroon" title="c5">x</font>, <a href="glib_005.html#K3" title="GLIB_005:func.3">AP:Step</a> <font color="Maroon" title="c6">Gn</font>]
 ;<br/><b>hence </b><a NAME="E4:24_1_1_1_1_1_1"/>
 ex <font color="Olive" title="b1">y</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>  st <font color="Maroon">S<sub>1</sub></font>[<font color="Maroon" title="c4">n</font>,<font color="Maroon" title="c5">x</font>,<font color="Olive" title="b1">y</font>]
 ; <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><div><a class="txt" onclick="hsNdiv(this)" href="javascript:()" title="24_1_1_1_1_1_2"><b>suppose </b></a><a NAME="E1:24_1_1_1_1_1_2"/>
<font color="Maroon" title="c5">x</font> is  not    <a href="glib_005.html#M1" title="GLIB_005:mode.1">AP:VLabeling</a> of <font color="Maroon" title="c2">EL</font>
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide">  ex <font color="Olive" title="b1">y</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>  st <font color="Maroon">S<sub>1</sub></font>[<font color="Maroon" title="c4">n</font>,<font color="Maroon" title="c5">x</font>,<font color="Olive" title="b1">y</font>]</span><br/><div class="add"><b>hence </b><a NAME="E2:24_1_1_1_1_1_2"/>
 ex <font color="Olive" title="b1">y</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>  st <font color="Maroon">S<sub>1</sub></font>[<font color="Maroon" title="c4">n</font>,<font color="Maroon" title="c5">x</font>,<font color="Olive" title="b1">y</font>]
 ; <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></div><b>end;</b></div></div><b>end;</b></div><b>hence </b><a NAME="E2:24_1_1_1"/>
 ex <font color="Olive" title="b1">y</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>  st <font color="Maroon">S<sub>1</sub></font>[<font color="Maroon" title="c4">n</font>,<font color="Maroon" title="c5">x</font>,<font color="Olive" title="b1">y</font>]
 ; <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>
<a NAME="E2:24_1_1"/><b>then </b><i><font color="Green" title="E19">A1</font></i>: 
for <font color="Olive" title="b1">n</font> being   <a href="subset_1.html#M2" title="SUBSET_1:mode.2">Element</a> of  <a href="numbers.html#K5" title="NUMBERS:func.5">NAT</a> <br/> for <font color="Olive" title="b2">x</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>   ex <font color="Olive" title="b3">y</font> being   <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a>  st <font color="Maroon">S<sub>1</sub></font>[<font color="Olive" title="b1">n</font>,<font color="Olive" title="b2">x</font>,<font color="Olive" title="b3">y</font>]
 
;<br/>
<b>consider </b><font color="Maroon" title="c4">IT</font> being   <a href="funct_1.html#NM1" title="FUNCT_1:NM.1">Function</a><b> such that </b><br/><a NAME="E4:24_1_1"/><i><font color="Green" title="E20">A3</font></i>: 
(  <a href="relat_1.html#NK2" title="RELAT_1:NK.2">dom</a> <font color="Maroon" title="c4">IT</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="numbers.html#K5" title="NUMBERS:func.5">NAT</a>  &amp; <font color="Maroon" title="c4">IT</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <a href="numbers.html#K6" title="NUMBERS:func.6">0</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">source</font> <a href="funcop_1.html#K16" title="FUNCOP_1:func.16">.--&gt;</a> 1 &amp; ( for <font color="Olive" title="b1">n</font> being   <a href="subset_1.html#M2" title="SUBSET_1:mode.2">Element</a> of  <a href="numbers.html#K5" title="NUMBERS:func.5">NAT</a>  holds  <font color="Maroon">S<sub>1</sub></font>[<font color="Olive" title="b1">n</font>,<font color="Maroon" title="c4">IT</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Olive" title="b1">n</font>,<font color="Maroon" title="c4">IT</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <span class="p1">(<span class="default"><font color="Olive" title="b1">n</font> <a href="nat_1.html#K2" title="NAT_1:func.2">+</a> 1</span>)</span>] ) )
 <b>from </b><i><a class="ref" href="recdef_1.html#S1" title="RECDEF_1:sch.1">RECDEF_1:sch 1</a>(<a class="txt" href="#E2:24_1_1"><i><font color="Green" title="E19">A1</font></i></a>);<br/></i>
<b>reconsider </b><font color="Maroon" title="c5">IT</font> = <font color="Maroon" title="c4">IT</font> as    <a href="pboole.html#M1" title="PBOOLE:mode.1">ManySortedSet</a> of  <a href="numbers.html#K5" title="NUMBERS:func.5">NAT</a>  <b>by </b><i><a class="txt" href="#E4:24_1_1"><i><font color="Green" title="E20">A3</font></i></a>, <a class="ref" href="pboole.html#D3" title="PBOOLE:def.3">PBOOLE:def 3</a></i>;<br/>
<b>defpred </b><font color="Maroon">S<sub>2</sub></font>[  <a href="nat_1.html#NM1" title="NAT_1:NM.1">Nat</a>] <b>means </b><font color="Maroon" title="c5">IT</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> $1 is    <a href="glib_005.html#M1" title="GLIB_005:mode.1">AP:VLabeling</a> of <font color="Maroon" title="c2">EL</font>;<br/>
<a NAME="E6:24_1_1"/><i><font color="Green" title="E21">A3a</font></i>: 
 <a href="relat_1.html#NK2" title="RELAT_1:NK.2">dom</a> <span class="p1">(<span class="default"><font color="Maroon" title="c3">source</font> <a href="funcop_1.html#K16" title="FUNCOP_1:func.16">.--&gt;</a> 1</span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="domain_1.html#K6" title="DOMAIN_1:func.6">{</a><span class="default"><font color="Maroon" title="c3">source</font></span><a href="domain_1.html#K6" title="DOMAIN_1:func.6">}</a></span>
 
<b>by </b><i><a class="ref" href="funcop_1.html#T19" title="FUNCOP_1:th.19">FUNCOP_1:19</a></i>;<br/>
<a NAME="E7:24_1_1"/><i><font color="Green" title="E22">A3b</font></i>: 
 <a href="relat_1.html#K2" title="RELAT_1:func.2">rng</a> <span class="p1">(<span class="default"><font color="Maroon" title="c3">source</font> <a href="funcop_1.html#K16" title="FUNCOP_1:func.16">.--&gt;</a> 1</span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="domain_1.html#K6" title="DOMAIN_1:func.6">{</a><span class="default">1</span><a href="domain_1.html#K6" title="DOMAIN_1:func.6">}</a></span>
 
<b>by </b><i><a class="ref" href="funcop_1.html#T14" title="FUNCOP_1:th.14">FUNCOP_1:14</a></i>;<br/>
<a NAME="E8:24_1_1"/><i><font color="Green" title="E23">A3e</font></i>: 
<font color="Maroon" title="c3">source</font> <a href="funcop_1.html#K16" title="FUNCOP_1:func.16">.--&gt;</a> 1 is    <a href="relset_1.html#M2" title="RELSET_1:mode.2">Relation</a> of  <a href="glib_000.html#K6" title="GLIB_000:func.6">the_Vertices_of</a> <font color="Maroon" title="c1">G</font>,<span class="p1"><a href="domain_1.html#K6" title="DOMAIN_1:func.6">{</a><span class="default">1</span><a href="domain_1.html#K6" title="DOMAIN_1:func.6">}</a></span> <a href="xboole_0.html#K2" title="XBOOLE_0:func.2">\/</a> <span class="p1">(<span class="default"><a href="glib_000.html#K7" title="GLIB_000:func.7">the_Edges_of</a> <font color="Maroon" title="c1">G</font></span>)</span>
 
<b>by </b><i><a class="txt" href="#E6:24_1_1"><i><font color="Green" title="E21">A3a</font></i></a>, <a class="txt" href="#E7:24_1_1"><i><font color="Green" title="E22">A3b</font></i></a>, <a class="ref" href="relset_1.html#T11" title="RELSET_1:th.11">RELSET_1:11</a>, <a class="ref" href="xboole_1.html#T7" title="XBOOLE_1:th.7">XBOOLE_1:7</a></i>;<br/>
<a NAME="E9:24_1_1"/><i><font color="Green" title="E24">A4</font></i>: 
<font color="Maroon">S<sub>2</sub></font>[ <a href="numbers.html#K6" title="NUMBERS:func.6">0</a> ]
 
<b>by </b><i><a class="txt" href="#E4:24_1_1"><i><font color="Green" title="E20">A3</font></i></a>, <a class="txt" href="#E8:24_1_1"><i><font color="Green" title="E23">A3e</font></i></a>, <a class="ref" href="glib_005.html#D5" target="_self" title="GLIB_005:def.5">HeHe</a></i>;<br/>
<div><i><font color="Green" title="E25">A5</font></i>: <a class="txt" onclick="hs2(this)" href="javascript:()" title="24_1_1_2"><b>now </b></a><div class="add"><b>let </b><font color="Maroon" title="c6">n</font> be   <a href="nat_1.html#NM1" title="NAT_1:NM.1">Nat</a>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> ( <font color="Maroon">S<sub>2</sub></font>[<font color="Maroon" title="c6">n</font>] implies <font color="Maroon">S<sub>2</sub></font>[<font color="Maroon" title="c6">n</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1] )</span><br/><a NAME="E1:24_1_1_2"/><i><font color="Green" title="E26">A6</font></i>: 
<font color="Maroon" title="c6">n</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="numbers.html#K5" title="NUMBERS:func.5">NAT</a> 
 <b>by </b><i><a class="ref" href="ordinal1.html#D13" title="ORDINAL1:def.13">ORDINAL1:def 13</a></i>;<br/><b>assume </b><a NAME="E2:24_1_1_2"/>
<font color="Maroon">S<sub>2</sub></font>[<font color="Maroon" title="c6">n</font>]
 ; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> <font color="Maroon">S<sub>2</sub></font>[<font color="Maroon" title="c6">n</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1]</span><br/><b>then consider </b><font color="Maroon" title="c7">Gn</font>, <font color="Maroon" title="c8">Gn1</font> being    <a href="glib_005.html#M1" title="GLIB_005:mode.1">AP:VLabeling</a> of <font color="Maroon" title="c2">EL</font><b> such that </b><br/><a NAME="E4:24_1_1_2"/><i><font color="Green" title="E27">A7</font></i>: 
( <font color="Maroon" title="c5">IT</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c6">n</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c7">Gn</font> &amp; <font color="Maroon" title="c5">IT</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <span class="p1">(<span class="default"><font color="Maroon" title="c6">n</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c8">Gn1</font> &amp; <font color="Maroon" title="c8">Gn1</font> <a href="relset_1.html#R2" title="RELSET_1:pred.2">=</a>  <a href="glib_005.html#K3" title="GLIB_005:func.3">AP:Step</a> <font color="Maroon" title="c7">Gn</font> )
 <b>by </b><i><a class="txt" href="#E4:24_1_1"><i><font color="Green" title="E20">A3</font></i></a>, <a class="txt" href="#E1:24_1_1_2"><i><font color="Green" title="E26">A6</font></i></a></i>;<br/><b>thus </b><a NAME="E5:24_1_1_2"/>
<font color="Maroon">S<sub>2</sub></font>[<font color="Maroon" title="c6">n</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1]
 <b>by </b><i><a class="txt" href="#E4:24_1_1_2"><i><font color="Green" title="E27">A7</font></i></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>
<a NAME="E11:24_1_1"/>
for <font color="Olive" title="b1">n</font> being  <a href="nat_1.html#NM1" title="NAT_1:NM.1">Nat</a> holds  <font color="Maroon">S<sub>2</sub></font>[<font color="Olive" title="b1">n</font>]
 
<b>from </b><i><a class="ref" href="nat_1.html#S2" title="NAT_1:sch.2">NAT_1:sch 2</a>(<a class="txt" href="#E9:24_1_1"><i><font color="Green" title="E24">A4</font></i></a>, <a class="txt" href="#E10:24_1_1"><i><font color="Green" title="E25">A5</font></i></a>);<br/></i>
<b>then reconsider </b><font color="Maroon" title="c6">IT</font> = <font color="Maroon" title="c5">IT</font> as    <a href="glib_005.html#M2" title="GLIB_005:mode.2">AP:VLabelingSeq</a> of <font color="Maroon" title="c2">EL</font> <b>by </b><i><a class="ref" href="glib_005.html#D11" target="_self" title="GLIB_005:def.11">DEF1</a></i>;<br/>
<b>take </b>
<font color="Maroon" title="c6">IT</font>
; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> ( <font color="Maroon" title="c6">IT</font> <a href="glib_005.html#K4" title="GLIB_005:func.4">.</a> <a href="numbers.html#K6" title="NUMBERS:func.6">0</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">source</font> <a href="funcop_1.html#K16" title="FUNCOP_1:func.16">.--&gt;</a> 1 &amp; ( for <font color="Olive" title="b1">n</font> being  <a href="nat_1.html#NM1" title="NAT_1:NM.1">Nat</a> holds  <font color="Maroon" title="c6">IT</font> <a href="glib_005.html#K4" title="GLIB_005:func.4">.</a> <span class="p1">(<span class="default"><font color="Olive" title="b1">n</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span> <a href="relset_1.html#R2" title="RELSET_1:pred.2">=</a>  <a href="glib_005.html#K3" title="GLIB_005:func.3">AP:Step</a> <span class="p1">(<span class="default"><font color="Maroon" title="c6">IT</font> <a href="glib_005.html#K4" title="GLIB_005:func.4">.</a> <font color="Olive" title="b1">n</font></span>)</span> ) )</span><br/>

<b>thus </b><a NAME="E13:24_1_1"/>
<font color="Maroon" title="c6">IT</font> <a href="glib_005.html#K4" title="GLIB_005:func.4">.</a> <a href="numbers.html#K6" title="NUMBERS:func.6">0</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">source</font> <a href="funcop_1.html#K16" title="FUNCOP_1:func.16">.--&gt;</a> 1
 <b>by </b><i><a class="txt" href="#E4:24_1_1"><i><font color="Green" title="E20">A3</font></i></a></i>; <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">n</font> being  <a href="nat_1.html#NM1" title="NAT_1:NM.1">Nat</a> holds  <font color="Maroon" title="c6">IT</font> <a href="glib_005.html#K4" title="GLIB_005:func.4">.</a> <span class="p1">(<span class="default"><font color="Olive" title="b1">n</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span> <a href="relset_1.html#R2" title="RELSET_1:pred.2">=</a>  <a href="glib_005.html#K3" title="GLIB_005:func.3">AP:Step</a> <span class="p1">(<span class="default"><font color="Maroon" title="c6">IT</font> <a href="glib_005.html#K4" title="GLIB_005:func.4">.</a> <font color="Olive" title="b1">n</font></span>)</span></span><br/>

<b>let </b><font color="Maroon" title="c7">n</font> be   <a href="nat_1.html#NM1" title="NAT_1:NM.1">Nat</a>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> <font color="Maroon" title="c6">IT</font> <a href="glib_005.html#K4" title="GLIB_005:func.4">.</a> <span class="p1">(<span class="default"><font color="Maroon" title="c7">n</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span> <a href="relset_1.html#R2" title="RELSET_1:pred.2">=</a>  <a href="glib_005.html#K3" title="GLIB_005:func.3">AP:Step</a> <span class="p1">(<span class="default"><font color="Maroon" title="c6">IT</font> <a href="glib_005.html#K4" title="GLIB_005:func.4">.</a> <font color="Maroon" title="c7">n</font></span>)</span></span><br/>

<a NAME="E14:24_1_1"/>
<font color="Maroon" title="c7">n</font> is    <a href="subset_1.html#M2" title="SUBSET_1:mode.2">Element</a> of  <a href="numbers.html#K5" title="NUMBERS:func.5">NAT</a> 
 
<b>by </b><i><a class="ref" href="ordinal1.html#D13" title="ORDINAL1:def.13">ORDINAL1:def 13</a></i>;<br/>
<a NAME="E15:24_1_1"/><b>then </b>
 ex <font color="Olive" title="b1">Gn</font>, <font color="Olive" title="b2">Gn1</font> being   <a href="glib_005.html#M1" title="GLIB_005:mode.1">AP:VLabeling</a> of <font color="Maroon" title="c2">EL</font> st <br/>( <font color="Maroon" title="c6">IT</font> <a href="glib_005.html#K4" title="GLIB_005:func.4">.</a> <font color="Maroon" title="c7">n</font> <a href="relset_1.html#R2" title="RELSET_1:pred.2">=</a> <font color="Olive" title="b1">Gn</font> &amp; <font color="Maroon" title="c6">IT</font> <a href="glib_005.html#K4" title="GLIB_005:func.4">.</a> <span class="p1">(<span class="default"><font color="Maroon" title="c7">n</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span> <a href="relset_1.html#R2" title="RELSET_1:pred.2">=</a> <font color="Olive" title="b2">Gn1</font> &amp; <font color="Olive" title="b2">Gn1</font> <a href="relset_1.html#R2" title="RELSET_1:pred.2">=</a>  <a href="glib_005.html#K3" title="GLIB_005:func.3">AP:Step</a> <font color="Olive" title="b1">Gn</font> )
 
<b>by </b><i><a class="txt" href="#E4:24_1_1"><i><font color="Green" title="E20">A3</font></i></a></i>;<br/>
<b>hence </b><a NAME="E16:24_1_1"/>
<font color="Maroon" title="c6">IT</font> <a href="glib_005.html#K4" title="GLIB_005:func.4">.</a> <span class="p1">(<span class="default"><font color="Maroon" title="c7">n</font> <a href="nat_1.html#K1" title="NAT_1:func.1">+</a> 1</span>)</span> <a href="relset_1.html#R2" title="RELSET_1:pred.2">=</a>  <a href="glib_005.html#K3" title="GLIB_005:func.3">AP:Step</a> <span class="p1">(<span class="default"><font color="Maroon" title="c6">IT</font> <a href="glib_005.html#K4" title="GLIB_005:func.4">.</a> <font color="Maroon" title="c7">n</font></span>)</span>
 ; <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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