Superpartient ratio

Revision as of 19:13, 6 September 2012 by Wikispaces>Sarzadoce (**Imported revision 362669752 - Original comment: **)

IMPORTED REVISION FROM WIKISPACES

This is an imported revision from Wikispaces. The revision metadata is included below for reference:

This revision was by author Sarzadoce and made on 2012-09-06 19:13:29 UTC.
The original revision id was 362669752.
The revision comment was:

The revision contents are below, presented both in the original Wikispaces Wikitext format, and in HTML exactly as Wikispaces rendered it.

Original Wikitext content:

Superpartient numbers are ratios of the form p/q, where p and q are relatively prime (so that the fraction is reduced to lowest terms), and p - q is greater than 1. In ancient Greece they were called Epimeric (epimerēs) ratios, which is literally translated as "above a part." These ratios were considered to be inferior to Epimoric ratios.

All epimeric ratios can be constructed as combinations of [[superparticular|superparticular numbers]]. For example, 9/5 is 3/2 × 6/5. In ancient Greece, fractions like 3/1 and 7/1 were not considered to be epimeric ratios because of the additional restriction that [[Harmonic|multiples of the fundamental]] cannot be epimeric.

When considering ratios, and particularly when they are ratios for [[comma|commas]], it can be useful to introduce the notion of the degree of epimericity. In terms of p/q reduced to lowest terms it is p - q. An epimoric ratio has degree 1, the 7-limit comma 245/243 degree 2, the 5-limit comma 128/125 degree 3, and so forth. [[http://en.wikipedia.org/wiki/St%C3%B8rmer's_theorem|Størmer's theorem]] can be extended to the claim that for each prime limit p and each degree of epimoricity n, there are only finitely many p-limit ratios with degree of epimoricity less than or equal to n.

Original HTML content:

<html><head><title>Superpartient</title></head><body>Superpartient numbers are ratios of the form p/q, where p and q are relatively prime (so that the fraction is reduced to lowest terms), and p - q is greater than 1. In ancient Greece they were called Epimeric (epimerēs) ratios, which is literally translated as &quot;above a part.&quot; These ratios were considered to be inferior to Epimoric ratios.<br />
<br />
All epimeric ratios can be constructed as combinations of <a class="wiki_link" href="/superparticular">superparticular numbers</a>. For example, 9/5 is 3/2 × 6/5. In ancient Greece, fractions like 3/1 and 7/1 were not considered to be epimeric ratios because of the additional restriction that <a class="wiki_link" href="/Harmonic">multiples of the fundamental</a> cannot be epimeric.<br />
<br />
When considering ratios, and particularly when they are ratios for <a class="wiki_link" href="/comma">commas</a>, it can be useful to introduce the notion of the degree of epimericity. In terms of p/q reduced to lowest terms it is p - q. An epimoric ratio has degree 1, the 7-limit comma 245/243 degree 2, the 5-limit comma 128/125 degree 3, and so forth. <a class="wiki_link_ext" href="http://en.wikipedia.org/wiki/St%C3%B8rmer's_theorem" rel="nofollow">Størmer's theorem</a> can be extended to the claim that for each prime limit p and each degree of epimoricity n, there are only finitely many p-limit ratios with degree of epimoricity less than or equal to n.</body></html>