Glacier comma: Difference between revisions

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{{Infobox Interval
{{Infobox interval
| Ratio = 373248/371293
| Ratio = 373248/371293
| Monzo = 9 6 0 0 0 -5
| Name = glacier comma
| Name = glacier comma
| Color name = 3u<sup>5</sup>-2, quinthu negative 2nd
| Color name = 3u<sup>5</sup>-2, quinthu negative 2nd
| Comma = yes
| Comma = yes
}}
}}
The '''glacier comma''' is a [[13-limit]] comma which is the difference between five small tridecimal neutral seconds of [[13/12]] and a perfect fifth ([[3/2]]).
The '''glacier comma''' is a [[13-limit]] comma which is the difference between five small tridecimal neutral seconds of [[13/12]] and a perfect fifth ([[3/2]]). It is a quintic-particular{{idiosyncratic}} interval, that is, of the form ((''n'' + 5)/''n'') / ((''n'' + 3)/(''n'' + 2))<sup>5</sup> = (S(''n'' + 1)⋅S(''n'' + 2)<sup>2</sup>) / (S(''n'' + 3)<sup>2</sup>⋅S(''n'' + 4)).


== Temperaments ==
== Temperaments ==
Tempering out this comma in the 13-limit leads to the [[glacier]] family.
[[Tempering out]] this comma in the 2.3.13 subgroup leads to the [[glacier]] temperament.
 
== See also ==
* [[Quinticular comma]] – another example of quintic-particular comma
 
[[Category:Commas named after composers]]
[[Category:Commas named after music theorists]]

Latest revision as of 15:30, 3 May 2026

Interval information
Ratio 373248/371293
Factorization 29 × 36 × 13-5
Monzo [9 6 0 0 0 -5
Size in cents 9.091696¢
Name glacier comma
Color name 3u5-2, quinthu negative 2nd
FJS name [math]\displaystyle{ \text{ddd}{-2}_{13,13,13,13,13} }[/math]
Special properties reduced
Tenney norm (log2 nd) 37.012
Weil norm (log2 max(n, d)) 37.0196
Wilson norm (sopfr(nd)) 101
Comma size small
Open this interval in xen-calc

The glacier comma is a 13-limit comma which is the difference between five small tridecimal neutral seconds of 13/12 and a perfect fifth (3/2). It is a quintic-particular[idiosyncratic term] interval, that is, of the form ((n + 5)/n) / ((n + 3)/(n + 2))5 = (S(n + 1)⋅S(n + 2)2) / (S(n + 3)2⋅S(n + 4)).

Temperaments

Tempering out this comma in the 2.3.13 subgroup leads to the glacier temperament.

See also