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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E34">Th21</font></span>: <a NAME="T25"><span class="comment"><font color="firebrick">:: MUSIC_S1:25</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">MS</font> being   <a href="music_s1.html#V3" title="MUSIC_S1:attr.3">satisfying_equiv</a>   <a href="music_s1.html#L1" title="MUSIC_S1:struct.1">MusicStruct</a> <br/>  for <font color="Olive" title="b2">a</font>, <font color="Olive" title="b3">b</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Olive" title="b1">MS</font> holds  <font color="Olive" title="b2">a</font>,<font color="Olive" title="b3">b</font> <a href="music_s1.html#R1" title="MUSIC_S1:pred.1">equiv</a> <font color="Olive" title="b2">a</font>,<font color="Olive" title="b3">b</font></div></div>
