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<div><span class="kw">theorem </span><a NAME="T109"><span class="comment"><font color="firebrick">:: MUSIC_S1:109</font></span><br/></a><div class="add"><a href="music_s1.html#K56" title="MUSIC_S1:func.56">pythagorean_tone</a> <a href="xcmplx_0.html#K7" title="XCMPLX_0:func.7">/</a> 2 <a href="xxreal_0.html#NR3" title="XXREAL_0:NR.3">&lt;</a>  <a href="music_s1.html#K69" title="MUSIC_S1:func.69">heptatonic_pythagorean_semitone</a>  ;<br/></div></div>
