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<b>let </b><font color="Maroon">f</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="bvfunc_1.html#K1" target="_self">BVF</a> <font color="Maroon">Y</font>;<br/>

<b>thus </b><a NAME="E1:5_1_1"/>
 <a href="relat_1.html#K2">rng</a> <font color="Maroon">f</font> <a href="tarski.html#R1">c=</a>  <a href="margrel1.html#K6">BOOLEAN</a> 
 <b>by </b><i><a class="ref" href="funct_2.html#T169">FUNCT_2:169</a></i>; <i><font color="Red">:: according to </font></i><a class="ref" href="valuat_1.html#D2">VALUAT_1:def 2</a><br/>


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