Superpartient ratio
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- This revision was by author genewardsmith and made on 2011-08-09 13:46:23 UTC.
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Original Wikitext content:
Superpartient numbers are ratios of the form (n+m)/n, or 1+m/n, where m is not n or a whole-number multiple of n, and where n is a whole number other than 1. Another way to say it is that is that they are non-integer ratios p/q, where p is greater than q and p and q are relatively prime (so that the fraction is reduced to lowest terms) and where 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. When considering ratios, and particularly when they are ratios for [[comma]]s, it can be useful to introduce the notion of the degree of epimericity. For 1+m/n, this is m; 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 commas 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 (n+m)/n, or 1+m/n, where m is not n or a whole-number multiple of n, and where n is a whole number other than 1. Another way to say it is that is that they are non-integer ratios p/q, where p is greater than q and p and q are relatively prime (so that the fraction is reduced to lowest terms) and where 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.<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.<br /> <br /> When considering ratios, and particularly when they are ratios for <a class="wiki_link" href="/comma">comma</a>s, it can be useful to introduce the notion of the degree of epimericity. For 1+m/n, this is m; 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 commas with degree of epimoricity less than or equal to n.</body></html>