Delta-rational chord: Difference between revisions

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 # A chord that has a delta signature with all entries +1 is called ''isodifferential''.
-Due to the aforementioned equivalence of delta signatures under scaling, delta signatures of ''n'' terms are really elements of a projective space <math>\mathbb{R}\mathbf{P}^{n-1};</math> they are specifically in the subset that is the image of the all-positive {{w|orthant}} of <math>\mathbb{R}^n.</math>
+Due to the aforementioned equivalence of delta signatures under scaling, delta signatures of ''n'' terms are really elements of <math>S^{n-1};</math> this is because they are specifically in the subset that is the image of the all-positive {{w|orthant}} of <math>\mathbb{R}^n.</math>
 In practice these terms can loosely refer to approximations of mathematically exact PDR and FDR chords, for example in [[edo]] tunings.