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<div><span class="kw">theorem </span><a NAME="T85"><span class="comment"><font color="firebrick">:: MUSIC_S1:85</font></span><br/></a><div class="add"> <a href="music_s1.html#K56" title="MUSIC_S1:func.56">pythagorean_tone</a>  <a href="xxreal_0.html#NR3" title="XXREAL_0:NR.3">&lt;</a>  <a href="music_s1.html#K57" title="MUSIC_S1:func.57">pentatonic_pythagorean_semiditone</a>  ;<br/></div></div>
