100/81: Difference between revisions

From Xenharmonic Wiki
Jump to navigation Jump to search
Touched up comma names, added "diptolemaic" to its naming due to its containing of 25.
*diptolemaic* is part of the Pythagorean-commatic naming system, which doesn't go with acute/grave
Line 1: Line 1:
{{Infobox Interval
{{Infobox Interval
| Name = (classical/diptolemaic) grave major third
| Name = classical grave major third, diptolemaic major third
| Color name = yy3, yoyo 3rd
| Color name = yy3, yoyo 3rd
}}
}}
 
'''100/81''', the '''classical grave major third''' or '''diptolemaic major third''', is a [[81/80|syntonic comma (81/80)]] flat of [[5/4]], a [[325/324|marveltwin comma (325/324)]] sharp of [[16/13]], and merely a [[1701/1700|palingenetic comma (1701/1700)]] flat of the interval [[21/17]]. It is obtained by stacking [[10/9|two small whole tones (10/9)]].  
'''100/81''', the (classical/diptolemaic) '''grave major third''', is a [[81/80|syntonic comma (81/80)]] flat of [[5/4]], a [[325/324|marveltwin comma (325/324)]] sharp of [[16/13]], and merely a [[1701/1700|palingenetic comma (1701/1700)]] flat of the interval [[21/17]]. It is obtained by stacking [[10/9|two small whole tones (10/9)]].  


[[Category:Third]]
[[Category:Third]]
[[Category:Submajor third]]
[[Category:Submajor third]]

Revision as of 15:46, 1 September 2026

Interval information
Ratio 100/81
Factorization 22 × 3-4 × 52
Monzo [2 -4 2
Size in cents 364.8074 ¢
Names classical grave major third,
diptolemaic major third
Color name yy3, yoyo 3rd
FJS name [math]\displaystyle{ \text{M3}^{5,5} }[/math]
Special properties reduced
Tenney norm (log2 nd) 12.9837
Weil norm (log2 max(n, d)) 13.2877
Wilson norm (sopfr(nd)) 26
Open this interval in xen-calc

100/81, the classical grave major third or diptolemaic major third, is a syntonic comma (81/80) flat of 5/4, a marveltwin comma (325/324) sharp of 16/13, and merely a palingenetic comma (1701/1700) flat of the interval 21/17. It is obtained by stacking two small whole tones (10/9).