Counterquectisma: Difference between revisions
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{{Mathematical interest}} | |||
{{Infobox Interval | {{Infobox Interval | ||
|Monzo = -500 314 1 | | Monzo = -500 314 1 | ||
|Name = counterquectisma, deltapion comma | | Name = counterquectisma, deltapion comma | ||
|Color name = Quintritrilayo comma | | Color name = Quintritrilayo comma | ||
|Comma = yes | | Comma = yes | ||
}} | }} | ||
''' | The '''counterquectisma''', alternatively known as the '''deltapion comma''', is an [[unnoticeable comma|unnoticeable]] [[5-limit]] [[comma]]. | ||
== Temperaments == | == Temperaments == | ||
It is associated with systems which have a precise perfect fifth, such as [[359edo]] and [[665edo]]. Tempering it out in the 5-limit produces rank-2 | It is associated with systems which have a precise perfect fifth, such as [[359edo]] and [[665edo]]. Tempering it out in the 5-limit produces rank-2 [[counterquectismic]] temperament. Equal tempereaments tempering out this comma include {{EDOs| 359, 665, 1024, 1689, 3684, 4349, 7368, 8033 }} among others. | ||
== Etymology == | == Etymology == | ||
The comma was named by [[Eliora]]. | The comma was named by [[Eliora]]. The first name is by analogy with [[quectisma]], meaning that both are the same commas that reach [[5/4]] from a different angle, with two mappings converging from opposite ends in [[665edo]]. The second name derives from comma's monzo, number 500 being D in roman numerals, and phonetic alphabet for D is "delta", to which "pi" is added to signify 314, the decimal expansion of pi. | ||
[[Category:Counterquectismic]] | |||
[[Category:Commas named by translating something into another language]] | |||