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<a NAME="E1:36_1_1"/><span class="lab"><font color="Green" title="E15">A1</font></span>: 
<font color="Maroon" title="c2">B</font> <a href="xboole_0.html#K2" title="XBOOLE_0:func.2">\/</a> <span class="p1"><a href="tarski.html#K1" title="TARSKI:func.1">{</a><span class="default"><font color="Maroon" title="c3">t</font></span><a href="tarski.html#K1" title="TARSKI:func.1">}</a></span> is <font color="Maroon" title="c2">B</font> <a href="proofs_1.html#V6" title="PROOFS_1:attr.6">-extending</a> 
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="xboole_1.html#T7" onmouseover="rs('xboole_1/T7')" onmouseout="rh()">XBOOLE_1:7</a></span>;<br/>
<a NAME="E2:36_1_1"/>
<font color="Maroon" title="c3">t</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a> <font color="Maroon" title="c1">Fml</font>
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="proofs_1.html#D3" target="_self" onmouseover="rs('proofs_1/D3')" onmouseout="rh()">Def3</a></span>;<br/>
<a NAME="E3:36_1_1"/><span class="kw">then </span>
<span class="p1"><a href="tarski.html#K1" title="TARSKI:func.1">{</a><span class="default"><font color="Maroon" title="c3">t</font></span><a href="tarski.html#K1" title="TARSKI:func.1">}</a></span> is   <a href="subset_1.html#NM2" title="SUBSET_1:NM.2">Subset</a> of <font color="Maroon" title="c1">Fml</font>
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="subset_1.html#T41" onmouseover="rs('subset_1/T41')" onmouseout="rh()">SUBSET_1:41</a></span>;<br/>
<span class="kw">hence </span><a NAME="E4:36_1_1"/>
<font color="Maroon" title="c2">B</font> <a href="xboole_0.html#K2" title="XBOOLE_0:func.2">\/</a> <span class="p1"><a href="tarski.html#K1" title="TARSKI:func.1">{</a><span class="default"><font color="Maroon" title="c3">t</font></span><a href="tarski.html#K1" title="TARSKI:func.1">}</a></span> is   <a href="proofs_1.html#NM10" title="PROOFS_1:NM.10">Extension</a> of <font color="Maroon" title="c2">B</font>
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E1:36_1_1"><span class="lab"><font color="Green" title="E15">A1</font></span></a>, <a class="ref" href="xboole_1.html#T8" onmouseover="rs('xboole_1/T8')" onmouseout="rh()">XBOOLE_1:8</a></span>; <a class="txt" onmouseover="tooltip.show('hs',this)" onmouseout="tooltip.hide()" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


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