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<b>let </b><font color="Maroon" title="c1">X</font> be  non <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>  <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ;<br/><b>let </b><font color="Maroon" title="c2">S</font> be   <a href="prob_1.html#NM3" title="PROB_1:NM.3">SigmaField</a> of <font color="Maroon" title="c1">X</font>;<br/><b>let </b><font color="Maroon" title="c3">f</font>, <font color="Maroon" title="c4">g</font> be   <a href="partfun1.html#NM1" title="PARTFUN1:NM.1">PartFunc</a> of <font color="Maroon" title="c1">X</font>, <a href="numbers.html#K6" title="NUMBERS:func.6">ExtREAL</a> ;<br/><b>let </b><font color="Maroon" title="c5">A</font> be    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Maroon" title="c2">S</font>;<br/>









<b>assume </b><b>that </b><br/><a NAME="E1:12"/><i><font color="Green" title="E11">A1</font></i>: 
<font color="Maroon" title="c3">f</font> <a href="mesfunc2.html#R1" title="MESFUNC2:pred.1">is_finite</a> 
 <b>and </b><br/><a NAME="E2:12"/><i><font color="Green" title="E12">A2</font></i>: 
<font color="Maroon" title="c4">g</font> <a href="mesfunc2.html#R1" title="MESFUNC2:pred.1">is_finite</a> 
 <b>and </b><br/><a NAME="E3:12"/><i><font color="Green" title="E13">A3</font></i>: 
<font color="Maroon" title="c3">f</font> <a href="mesfunc1.html#R2" title="MESFUNC1:pred.2">is_measurable_on</a> <font color="Maroon" title="c5">A</font>
 <b>and </b><br/><a NAME="E4:12"/><i><font color="Green" title="E14">A4</font></i>: 
<font color="Maroon" title="c4">g</font> <a href="mesfunc1.html#R2" title="MESFUNC1:pred.2">is_measurable_on</a> <font color="Maroon" title="c5">A</font>
 <b>and </b><br/><a NAME="E5:12"/><i><font color="Green" title="E15">A5</font></i>: 
<font color="Maroon" title="c5">A</font> <a href="tarski.html#R1" title="TARSKI:pred.1">c=</a>  <a href="relset_1.html#K4" title="RELSET_1:func.4">dom</a> <font color="Maroon" title="c4">g</font>
 ;<br/>

<a NAME="E6:12"/>
( <span class="p1">(<span class="default"><a href="real_1.html#K1" title="REAL_1:func.1">-</a> 1</span>)</span> <a href="mesfunc1.html#K8" title="MESFUNC1:func.8">(#)</a> <font color="Maroon" title="c4">g</font> <a href="mesfunc2.html#R1" title="MESFUNC2:pred.1">is_finite</a>  &amp; <span class="p1">(<span class="default"><a href="real_1.html#K1" title="REAL_1:func.1">-</a> 1</span>)</span> <a href="mesfunc1.html#K8" title="MESFUNC1:func.8">(#)</a> <font color="Maroon" title="c4">g</font> <a href="mesfunc1.html#R2" title="MESFUNC1:pred.2">is_measurable_on</a> <font color="Maroon" title="c5">A</font> )
 
<b>by </b><i><a class="txt" href="mesfunc2.html#E2:12"><i><font color="Green" title="E12">A2</font></i></a>, <a class="txt" href="mesfunc2.html#E4:12"><i><font color="Green" title="E14">A4</font></i></a>, <a class="txt" href="mesfunc2.html#E5:12"><i><font color="Green" title="E15">A5</font></i></a>, <a class="ref" href="mesfunc2.html#T12" target="_self" title="MESFUNC2:th.12">Th12</a>, <a class="ref" href="mesfunc1.html#T41" title="MESFUNC1:th.41">MESFUNC1:41</a></i>;<br/>
<a NAME="E7:12"/><b>then </b>
(  <a href="mesfunc1.html#K9" title="MESFUNC1:func.9">-</a> <font color="Maroon" title="c4">g</font> <a href="mesfunc2.html#R1" title="MESFUNC2:pred.1">is_finite</a>  &amp;  <a href="mesfunc1.html#K9" title="MESFUNC1:func.9">-</a> <font color="Maroon" title="c4">g</font> <a href="mesfunc1.html#R2" title="MESFUNC1:pred.2">is_measurable_on</a> <font color="Maroon" title="c5">A</font> )
 
<b>by </b><i><a class="ref" href="mesfunc2.html#T11" target="_self" title="MESFUNC2:th.11">Th11</a></i>;<br/>
<a NAME="E8:12"/><b>then </b>
<font color="Maroon" title="c3">f</font> <a href="mesfunc1.html#K13" title="MESFUNC1:func.13">+</a> <span class="p1">(<span class="default"><a href="mesfunc1.html#K9" title="MESFUNC1:func.9">-</a> <font color="Maroon" title="c4">g</font></span>)</span> <a href="mesfunc1.html#R2" title="MESFUNC1:pred.2">is_measurable_on</a> <font color="Maroon" title="c5">A</font>
 
<b>by </b><i><a class="txt" href="mesfunc2.html#E1:12"><i><font color="Green" title="E11">A1</font></i></a>, <a class="txt" href="mesfunc2.html#E3:12"><i><font color="Green" title="E13">A3</font></i></a>, <a class="ref" href="mesfunc2.html#T7" target="_self" title="MESFUNC2:th.7">Th7</a></i>;<br/>
<b>hence </b><a NAME="E9:12"/>
<font color="Maroon" title="c3">f</font> <a href="mesfunc1.html#K6" title="MESFUNC1:func.6">-</a> <font color="Maroon" title="c4">g</font> <a href="mesfunc1.html#R2" title="MESFUNC1:pred.2">is_measurable_on</a> <font color="Maroon" title="c5">A</font>
 <b>by </b><i><a class="ref" href="mesfunc2.html#T9" target="_self" title="MESFUNC2:th.9">Th9</a></i>;<br/>


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