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<b>reconsider </b><font color="Maroon" title="c3">i</font> =  <a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> the <a href="msualg_1.html#U4" title="MSUALG_1:sel.4">Sorts</a> of <font color="Maroon" title="c2">U1</font> as    <a href="autalg_1.html#M2" title="AUTALG_1:mode.2">Element</a> of  <a href="endalg.html#K4" title="ENDALG:func.4">MSAEnd</a> <font color="Maroon" title="c2">U1</font> <b>by </b><i><a class="ref" href="endalg.html#T10" target="_self" title="ENDALG:th.10">Th10</a></i>;<br/>
<b>set </b><font color="Maroon" title="c4">H</font> =  <a href="algstr_0.html#G4" title="ALGSTR_0:aggr.4">multLoopStr</a>(# <span class="p1">(<span class="default"><a href="endalg.html#K4" title="ENDALG:func.4">MSAEnd</a> <font color="Maroon" title="c2">U1</font></span>)</span>,<span class="p1">(<span class="default"><a href="endalg.html#K5" title="ENDALG:func.5">MSAEndComp</a> <font color="Maroon" title="c2">U1</font></span>)</span>,<font color="Maroon" title="c3">i</font> #);<br/>
<b>thus </b><a NAME="E2:20_1_1"/>
 <a href="endalg.html#K6" title="ENDALG:func.6">MSAEndMonoid</a> <font color="Maroon" title="c2">U1</font> is <a href="vectsp_1.html#V4" title="VECTSP_1:attr.4">well-unital</a>
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="20_1_1_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon" title="c5">x</font> be   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <span class="p1">(<span class="default"><a href="endalg.html#K6" title="ENDALG:func.6">MSAEndMonoid</a> <font color="Maroon" title="c2">U1</font></span>)</span>; <i><font color="Red">:: according to </font></i><a class="ref" href="vectsp_1.html#D16" title="VECTSP_1:def.16">VECTSP_1:def 16</a><br/>

<a NAME="E1:20_1_1_1"/>
 <a href="struct_0.html#K5" title="STRUCT_0:func.5">1.</a> <span class="p1">(<span class="default"><a href="endalg.html#K6" title="ENDALG:func.6">MSAEndMonoid</a> <font color="Maroon" title="c2">U1</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">i</font>
 
<b>by </b><i><a class="ref" href="endalg.html#D6" target="_self" title="ENDALG:def.6">Def6</a></i>;<br/>
<b>hence </b><a NAME="E2:20_1_1_1"/>
( <font color="Maroon" title="c5">x</font> <a href="algstr_0.html#K6" title="ALGSTR_0:func.6">*</a> <span class="p1">(<span class="default"><a href="struct_0.html#K5" title="STRUCT_0:func.5">1.</a> <span class="p2">(<span class="default"><a href="endalg.html#K6" title="ENDALG:func.6">MSAEndMonoid</a> <font color="Maroon" title="c2">U1</font></span>)</span></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c5">x</font> &amp; <span class="p1">(<span class="default"><a href="struct_0.html#K5" title="STRUCT_0:func.5">1.</a> <span class="p2">(<span class="default"><a href="endalg.html#K6" title="ENDALG:func.6">MSAEndMonoid</a> <font color="Maroon" title="c2">U1</font></span>)</span></span>)</span> <a href="algstr_0.html#K6" title="ALGSTR_0:func.6">*</a> <font color="Maroon" title="c5">x</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c5">x</font> )
 <b>by </b><i><a class="txt" href="endalg.html#E20"><i><font color="Green" title="E14">Lm2</font></i></a></i>;<br/>


</div><b>end;</b></div>

<a NAME="E3:20_1_1"/><i><font color="Green" title="E15">A1</font></i>: 
 <a href="struct_0.html#K5" title="STRUCT_0:func.5">1.</a> <a href="algstr_0.html#G4" title="ALGSTR_0:aggr.4">multLoopStr</a>(# <span class="p1">(<span class="default"><a href="endalg.html#K4" title="ENDALG:func.4">MSAEnd</a> <font color="Maroon" title="c2">U1</font></span>)</span>,<span class="p1">(<span class="default"><a href="endalg.html#K5" title="ENDALG:func.5">MSAEndComp</a> <font color="Maroon" title="c2">U1</font></span>)</span>,<font color="Maroon" title="c3">i</font> #) <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">i</font>
 
;<br/>
<a NAME="E4:20_1_1"/>
 <a href="algstr_0.html#G4" title="ALGSTR_0:aggr.4">multLoopStr</a>(# <span class="p1">(<span class="default"><a href="endalg.html#K4" title="ENDALG:func.4">MSAEnd</a> <font color="Maroon" title="c2">U1</font></span>)</span>,<span class="p1">(<span class="default"><a href="endalg.html#K5" title="ENDALG:func.5">MSAEndComp</a> <font color="Maroon" title="c2">U1</font></span>)</span>,<font color="Maroon" title="c3">i</font> #) is <a href="group_1.html#V3" title="GROUP_1:attr.3">associative</a>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="20_1_1_2"><b>proof </b></a><div class="add">

<b>thus </b><a NAME="E1:20_1_1_2"/>
for <font color="Olive" title="b1">f</font>, <font color="Olive" title="b2">g</font>, <font color="Olive" title="b3">h</font> being  <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <a href="algstr_0.html#G4" title="ALGSTR_0:aggr.4">multLoopStr</a>(# <span class="p1">(<span class="default"><a href="endalg.html#K4" title="ENDALG:func.4">MSAEnd</a> <font color="Maroon" title="c2">U1</font></span>)</span>,<span class="p1">(<span class="default"><a href="endalg.html#K5" title="ENDALG:func.5">MSAEndComp</a> <font color="Maroon" title="c2">U1</font></span>)</span>,<font color="Maroon" title="c3">i</font> #) holds  <span class="p1">(<span class="default"><font color="Olive" title="b1">f</font> <a href="algstr_0.html#K6" title="ALGSTR_0:func.6">*</a> <font color="Olive" title="b2">g</font></span>)</span> <a href="algstr_0.html#K6" title="ALGSTR_0:func.6">*</a> <font color="Olive" title="b3">h</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b1">f</font> <a href="algstr_0.html#K6" title="ALGSTR_0:func.6">*</a> <span class="p1">(<span class="default"><font color="Olive" title="b2">g</font> <a href="algstr_0.html#K6" title="ALGSTR_0:func.6">*</a> <font color="Olive" title="b3">h</font></span>)</span>
  <i><font color="Red">:: according to </font></i><a class="ref" href="group_1.html#D4" title="GROUP_1:def.4">GROUP_1:def 4</a><div><a class="txt" onclick="hs2(this)" href="javascript:()" title="20_1_1_2_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon" title="c5">f</font>, <font color="Maroon" title="c6">g</font>, <font color="Maroon" title="c7">h</font> be   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <a href="algstr_0.html#G4" title="ALGSTR_0:aggr.4">multLoopStr</a>(# <span class="p1">(<span class="default"><a href="endalg.html#K4" title="ENDALG:func.4">MSAEnd</a> <font color="Maroon" title="c2">U1</font></span>)</span>,<span class="p1">(<span class="default"><a href="endalg.html#K5" title="ENDALG:func.5">MSAEndComp</a> <font color="Maroon" title="c2">U1</font></span>)</span>,<font color="Maroon" title="c3">i</font> #);<br/>

<b>reconsider </b><font color="Maroon" title="c8">A</font> = <font color="Maroon" title="c5">f</font>, <font color="Maroon" title="c9">B</font> = <font color="Maroon" title="c6">g</font>, <font color="Maroon" title="c10">C</font> = <font color="Maroon" title="c7">h</font> as    <a href="autalg_1.html#M2" title="AUTALG_1:mode.2">Element</a> of  <a href="endalg.html#K4" title="ENDALG:func.4">MSAEnd</a> <font color="Maroon" title="c2">U1</font> ;<br/>
<a NAME="E2:20_1_1_2_1"/><i><font color="Green" title="E16">A2</font></i>: 
<font color="Maroon" title="c5">f</font> <a href="algstr_0.html#K6" title="ALGSTR_0:func.6">*</a> <font color="Maroon" title="c6">g</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c9">B</font> <a href="msualg_3.html#K3" title="MSUALG_3:func.3">**</a> <font color="Maroon" title="c8">A</font>
 
<b>by </b><i><a class="ref" href="endalg.html#D5" target="_self" title="ENDALG:def.5">Def5</a></i>;<br/>
<a NAME="E3:20_1_1_2_1"/><i><font color="Green" title="E17">A3</font></i>: 
<font color="Maroon" title="c6">g</font> <a href="algstr_0.html#K6" title="ALGSTR_0:func.6">*</a> <font color="Maroon" title="c7">h</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c10">C</font> <a href="msualg_3.html#K3" title="MSUALG_3:func.3">**</a> <font color="Maroon" title="c9">B</font>
 
<b>by </b><i><a class="ref" href="endalg.html#D5" target="_self" title="ENDALG:def.5">Def5</a></i>;<br/>
<b>thus </b><span class="p1">(<span class="default"><font color="Maroon" title="c5">f</font> <a href="algstr_0.html#K6" title="ALGSTR_0:func.6">*</a> <font color="Maroon" title="c6">g</font></span>)</span> <a href="algstr_0.html#K6" title="ALGSTR_0:func.6">*</a> <font color="Maroon" title="c7">h</font> = 
<font color="Maroon" title="c10">C</font> <a href="msualg_3.html#K3" title="MSUALG_3:func.3">**</a> <span class="p1">(<span class="default"><font color="Maroon" title="c9">B</font> <a href="msualg_3.html#K3" title="MSUALG_3:func.3">**</a> <font color="Maroon" title="c8">A</font></span>)</span>
<b>by </b><i><a class="txt" href="endalg.html#E2:20_1_1_2_1"><i><font color="Green" title="E16">A2</font></i></a>, <a class="ref" href="endalg.html#D5" target="_self" title="ENDALG:def.5">Def5</a></i>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon" title="c10">C</font> <a href="msualg_3.html#K3" title="MSUALG_3:func.3">**</a> <font color="Maroon" title="c9">B</font></span>)</span> <a href="msualg_3.html#K3" title="MSUALG_3:func.3">**</a> <font color="Maroon" title="c8">A</font>
<b>by </b><i><a class="ref" href="autalg_1.html#T13" title="AUTALG_1:th.13">AUTALG_1:13</a></i>
<br/>.= 
<font color="Maroon" title="c5">f</font> <a href="algstr_0.html#K6" title="ALGSTR_0:func.6">*</a> <span class="p1">(<span class="default"><font color="Maroon" title="c6">g</font> <a href="algstr_0.html#K6" title="ALGSTR_0:func.6">*</a> <font color="Maroon" title="c7">h</font></span>)</span>
<b>by </b><i><a class="txt" href="endalg.html#E3:20_1_1_2_1"><i><font color="Green" title="E17">A3</font></i></a>, <a class="ref" href="endalg.html#D5" target="_self" title="ENDALG:def.5">Def5</a></i>
;<br/>


</div><b>end;</b></div>


</div><b>end;</b></div>
<b>hence </b><a NAME="E5:20_1_1"/>
 <a href="endalg.html#K6" title="ENDALG:func.6">MSAEndMonoid</a> <font color="Maroon" title="c2">U1</font> is <a href="group_1.html#V3" title="GROUP_1:attr.3">associative</a>
 <b>by </b><i><a class="txt" href="endalg.html#E3:20_1_1"><i><font color="Green" title="E15">A1</font></i></a>, <a class="ref" href="endalg.html#D6" target="_self" title="ENDALG:def.6">Def6</a></i>;<br/>


</div>
