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<b>let </b><font color="Maroon" title="c1">f</font> be   <a href="funct_1.html#NM1" title="FUNCT_1:NM.1">Function</a>;<br/>

<b>assume </b><a NAME="E1:2_1_1"/><i><font color="Green" title="E2">A1</font></i>: 
<font color="Maroon" title="c1">f</font> is <a href="group_7.html#V1" title="GROUP_7:attr.1">HGrStr-yielding</a>
 ;<br/>

<b>let </b><font color="Maroon" title="c2">x</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="pralg_1.html#D11" title="PRALG_1:def.11">PRALG_1:def 11</a><br/>

<b>assume </b><a NAME="E2:2_1_1"/>
<font color="Maroon" title="c2">x</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="relat_1.html#NK2" title="RELAT_1:NK.2">dom</a> <font color="Maroon" title="c1">f</font>
 ;<br/>

<a NAME="E3:2_1_1"/><b>then </b>
<font color="Maroon" title="c1">f</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c2">x</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="relat_1.html#K2" title="RELAT_1:func.2">rng</a> <font color="Maroon" title="c1">f</font>
 
<b>by </b><i><a class="ref" href="funct_1.html#D5" title="FUNCT_1:def.5">FUNCT_1:def 5</a></i>;<br/>
<b>hence </b><a NAME="E4:2_1_1"/>
<font color="Maroon" title="c1">f</font> <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> <font color="Maroon" title="c2">x</font> is    <a href="struct_0.html#L1" title="STRUCT_0:struct.1">1-sorted</a> 
 <b>by </b><i><a class="txt" href="group_7.html#E1:2_1_1"><i><font color="Green" title="E2">A1</font></i></a>, <a class="ref" href="group_7.html#D1" target="_self" title="GROUP_7:def.1">Def1</a></i>;<br/>


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