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<b>let </b><font color="Maroon">M</font> be  non <a href="xboole_0.html#V1">empty</a>  <a href="hidden.html#M1">set</a> ;<br/>

<b>assume </b><b>that </b><br/><a NAME="E1:8"/><i><font color="Green">E37</font></i>: 
<font color="Maroon">M</font> is <a href="ordinal1.html#V1">epsilon-transitive</a>
 <b>and </b><br/><a NAME="E2:8"/><i><font color="Green">E38</font></i>: 
<font color="Maroon">M</font> <a href="zf_model.html#R2">|=</a>  <a href="zf_model.html#K7">the_axiom_of_pairs</a> 
 <b>and </b><br/><a NAME="E3:8"/><i><font color="Green">E56</font></i>: 
<font color="Maroon">M</font> <a href="zf_model.html#R2">|=</a>  <a href="zf_model.html#K8">the_axiom_of_unions</a> 
 <b>and </b><br/><a NAME="E4:8"/><i><font color="Green">E57</font></i>: 
<font color="Maroon">M</font> <a href="zf_model.html#R2">|=</a>  <a href="zf_model.html#K9">the_axiom_of_infinity</a> 
 <b>and </b><br/><a NAME="E5:8"/><i><font color="Green">E58</font></i>: 
<font color="Maroon">M</font> <a href="zf_model.html#R2">|=</a>  <a href="zf_model.html#K10">the_axiom_of_power_sets</a> 
 <b>and </b><br/><a NAME="E6:8"/><i><font color="Green">E59</font></i>: 
for <font color="Olive">H</font> being  <a href="zf_lang.html#NM2">ZF-formula</a>  st <span class="p1"><a href="enumset1.html#K1">{</a><span class="default"><span class="p2">(<span class="default"><a href="zf_lang.html#K2">x.</a> 0</span>)</span>,<span class="p2">(<span class="default"><a href="zf_lang.html#K2">x.</a> 1</span>)</span>,<span class="p2">(<span class="default"><a href="zf_lang.html#K2">x.</a> 2</span>)</span></span><a href="enumset1.html#K1">}</a></span> <a href="xboole_0.html#R1">misses</a>  <a href="zf_model.html#K2">Free</a> <font color="Olive">H</font> holds <br/><font color="Maroon">M</font> <a href="zf_model.html#R2">|=</a>  <a href="zf_model.html#K11">the_axiom_of_substitution_for</a> <font color="Olive">H</font>
 ; <i><font color="Red">:: according to </font></i><a class="ref" href="zf_model.html#D12">ZF_MODEL:def 12</a><br/>

<b>let </b><font color="Maroon">H</font> be   <a href="zf_lang.html#NM2">ZF-formula</a>; <i><font color="Red">:: according to </font></i><a class="ref" href="zfrefle1.html#D1" target="_self">ZFREFLE1:def 1</a><br/>

<b>assume </b><a NAME="E7:8"/>
<font color="Maroon">H</font> <a href="hidden.html#R2">in</a>  <a href="zfrefle1.html#K2" target="_self">ZF-axioms</a> 
 ;<br/>

<a NAME="E8:8"/><b>then </b>
( <font color="Maroon">H</font> <a href="hidden.html#R1">=</a>  <a href="zf_model.html#K6">the_axiom_of_extensionality</a>  or <font color="Maroon">H</font> <a href="hidden.html#R1">=</a>  <a href="zf_model.html#K7">the_axiom_of_pairs</a>  or <font color="Maroon">H</font> <a href="hidden.html#R1">=</a>  <a href="zf_model.html#K8">the_axiom_of_unions</a>  or <font color="Maroon">H</font> <a href="hidden.html#R1">=</a>  <a href="zf_model.html#K9">the_axiom_of_infinity</a>  or <font color="Maroon">H</font> <a href="hidden.html#R1">=</a>  <a href="zf_model.html#K10">the_axiom_of_power_sets</a>  or  ex <font color="Olive">H1</font> being  <a href="zf_lang.html#NM2">ZF-formula</a> st <br/>( <span class="p1"><a href="enumset1.html#K1">{</a><span class="default"><span class="p2">(<span class="default"><a href="zf_lang.html#K2">x.</a> 0</span>)</span>,<span class="p2">(<span class="default"><a href="zf_lang.html#K2">x.</a> 1</span>)</span>,<span class="p2">(<span class="default"><a href="zf_lang.html#K2">x.</a> 2</span>)</span></span><a href="enumset1.html#K1">}</a></span> <a href="xboole_0.html#R1">misses</a>  <a href="zf_model.html#K2">Free</a> <font color="Olive">H1</font> &amp; <font color="Maroon">H</font> <a href="hidden.html#R1">=</a>  <a href="zf_model.html#K11">the_axiom_of_substitution_for</a> <font color="Olive">H1</font> ) )
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E9:8"/>
<font color="Maroon">M</font> <a href="zf_model.html#R2">|=</a> <font color="Maroon">H</font>
 <b>by </b><i>, , , , , , <a class="ref" href="zfmodel1.html#T1">ZFMODEL1:1</a></i>;<br/>


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