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<b>consider </b><font color="Maroon">op</font> being    <a href="osalg_1.html#M1" target="_self">Element</a> of <font color="Maroon">on</font><b> such that </b><br/><a NAME="E2:92_1_2"/><i><font color="Green">E88</font></i>: 
<font color="Maroon">w</font> <a href="osalg_1.html#R2" target="_self">&lt;=</a>  <a href="msualg_1.html#K1">the_arity_of</a> <font color="Maroon">op</font>
 <b>by </b><i/>;<br/>
<b>let </b><font color="Maroon">op1</font> be    <a href="osalg_1.html#M1" target="_self">Element</a> of <font color="Maroon">on</font>, <font color="Maroon">op2</font> be    <a href="osalg_1.html#M1" target="_self">Element</a> of <font color="Maroon">on</font>;<br/>

<b>assume </b><b>that </b><br/><a NAME="E3:92_1_2"/><i><font color="Green">E89</font></i>: 
for <font color="Olive">op3</font> being   <a href="osalg_1.html#M1" target="_self">Element</a> of <font color="Maroon">on</font>  st <font color="Maroon">w</font> <a href="osalg_1.html#R2" target="_self">&lt;=</a>  <a href="msualg_1.html#K1">the_arity_of</a> <font color="Olive">op3</font> holds <br/><font color="Maroon">op1</font> <a href="hidden.html#R1">=</a>  <a href="osalg_1.html#K3" target="_self">LBound</a> <font color="Olive">op3</font>,<font color="Maroon">w</font>
 <b>and </b><br/><a NAME="E4:92_1_2"/><i><font color="Green">E90</font></i>: 
for <font color="Olive">op3</font> being   <a href="osalg_1.html#M1" target="_self">Element</a> of <font color="Maroon">on</font>  st <font color="Maroon">w</font> <a href="osalg_1.html#R2" target="_self">&lt;=</a>  <a href="msualg_1.html#K1">the_arity_of</a> <font color="Olive">op3</font> holds <br/><font color="Maroon">op2</font> <a href="hidden.html#R1">=</a>  <a href="osalg_1.html#K3" target="_self">LBound</a> <font color="Olive">op3</font>,<font color="Maroon">w</font>
 ;<br/>

<a NAME="E5:92_1_2"/>
( <font color="Maroon">op1</font> <a href="hidden.html#R1">=</a>  <a href="osalg_1.html#K3" target="_self">LBound</a> <font color="Maroon">op</font>,<font color="Maroon">w</font> &amp; <font color="Maroon">op2</font> <a href="hidden.html#R1">=</a>  <a href="osalg_1.html#K3" target="_self">LBound</a> <font color="Maroon">op</font>,<font color="Maroon">w</font> )
 
<b>by </b><i>, , </i>;<br/>
<b>hence </b><a NAME="E6:92_1_2"/>
<font color="Maroon">op1</font> <a href="hidden.html#R1">=</a> <font color="Maroon">op2</font>
 ;<br/>


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