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<b>let </b><font color="Maroon">R</font> be   <a href="funcsdom.html#NM1">Ring</a>;<br/><b>let </b><font color="Maroon">V</font> be   <a href="vectsp_2.html#NM7">RightMod</a> of <font color="Maroon">R</font>;<br/><b>let </b><font color="Maroon">W1</font> be    <a href="rmod_2.html#M1">Submodule</a> of <font color="Maroon">V</font>;<br/><b>let </b><font color="Maroon">W2</font> be    <a href="rmod_2.html#M1">Submodule</a> of <font color="Maroon">V</font>;<br/><b>let </b><font color="Maroon">W3</font> be    <a href="rmod_2.html#M1">Submodule</a> of <font color="Maroon">V</font>;<br/>









<b>assume </b><a NAME="E1:22"/><i><font color="Green">E30</font></i>: 
<font color="Maroon">W1</font> is    <a href="rmod_2.html#M1">Submodule</a> of <font color="Maroon">W2</font>
 ;<br/>

<b>set </b><font color="Maroon">A1</font> = the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">W1</font>;<br/>
<b>set </b><font color="Maroon">A2</font> = the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">W2</font>;<br/>
<b>set </b><font color="Maroon">A3</font> = the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">W3</font>;<br/>
<b>set </b><font color="Maroon">A4</font> = the <a href="struct_0.html#U1">carrier</a> of <span class="p1">(<span class="default"><font color="Maroon">W1</font> <a href="rmod_3.html#K2" target="_self">/\</a> <font color="Maroon">W3</font></span>)</span>;<br/>
<a NAME="E2:22"/>
the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">W1</font> <a href="tarski.html#R1">c=</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">W2</font>
 
<b>by </b><i>, <a class="ref" href="rmod_2.html#D2">RMOD_2:def 2</a></i>;<br/>
<a NAME="E3:22"/><b>then </b>
the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">W1</font> <a href="xboole_0.html#K3">/\</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">W3</font> <a href="tarski.html#R1">c=</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">W2</font> <a href="xboole_0.html#K3">/\</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">W3</font>
 
<b>by </b><i><a class="ref" href="xboole_1.html#T26">XBOOLE_1:26</a></i>;<br/>
<a NAME="E4:22"/><b>then </b>
the <a href="struct_0.html#U1">carrier</a> of <span class="p1">(<span class="default"><font color="Maroon">W1</font> <a href="rmod_3.html#K2" target="_self">/\</a> <font color="Maroon">W3</font></span>)</span> <a href="tarski.html#R1">c=</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">W2</font> <a href="xboole_0.html#K3">/\</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">W3</font>
 
<b>by </b><i/>;<br/>
<a NAME="E5:22"/><b>then </b>
the <a href="struct_0.html#U1">carrier</a> of <span class="p1">(<span class="default"><font color="Maroon">W1</font> <a href="rmod_3.html#K2" target="_self">/\</a> <font color="Maroon">W3</font></span>)</span> <a href="tarski.html#R1">c=</a> the <a href="struct_0.html#U1">carrier</a> of <span class="p1">(<span class="default"><font color="Maroon">W2</font> <a href="rmod_3.html#K2" target="_self">/\</a> <font color="Maroon">W3</font></span>)</span>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E6:22"/>
<font color="Maroon">W1</font> <a href="rmod_3.html#K2" target="_self">/\</a> <font color="Maroon">W3</font> is    <a href="rmod_2.html#M1">Submodule</a> of <font color="Maroon">W2</font> <a href="rmod_3.html#K2" target="_self">/\</a> <font color="Maroon">W3</font>
 <b>by </b><i><a class="ref" href="rmod_2.html#T35">RMOD_2:35</a></i>;<br/>


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