7/4: Difference between revisions

Xenwolf (talk | contribs)
m Approximations: minor cleanup
Xenwolf (talk | contribs)
Approximations: table reworked: edos in range 1..200, error magnitudes within 7c and 7rc
Line 62: Line 62:
== Approximations ==
== Approximations ==


[[EDO]]s containing good approximations of the interval 7:4 are (pre-ordered by [[relative error]]):
[[EDO]]s (up to 200) containing good approximations<ref>absolute error < 7 cents and relative error < 7 rc </ref> of the interval 7:4 are (pre-ordered by magnitude of [[relative error]]):


{| class="wikitable sortable center-1 right-2 right-3"
{| class="wikitable sortable right-1 center-2 right-3 right-4"
|-
|-
! [[EDO]]
! [[EDO]]
! Abs error ([[Cent|¢]])
! class="unsortable" | deg\edo
! Rel error ([[Relative cent|r¢]])
! Absolute <br> error ([[Cent|¢]])
! class="unsortable" | Prominent Multiples
! Relative <br> error ([[Relative cent|r¢]])
! class="unsortable" | Prominent multiples <ref>Multiples up to 200edo with approximation better then 7rc off</ref>
|-
|-
| [[26edo]]
| [[109edo|109]]
| 0.40486
| 88\109
| 0.87720
| +0.0186
| [[78edo]]
| +0.1687
|
|-
| [[135edo|135]]
| 109\135
| -0.0630
| -0.7086
|-
| [[26edo|26]]
| 21\26
| -0.4049
| -0.8772
| [[52edo|42\52]], [[78edo|63\78]], [[104edo|84\104]], [[130edo|105\130]], [[156edo|126\156]], 147\182
|-
| [[83edo|83]]
| 67\83
| +0.1512
| +1.0459
| [[166edo|134\166]]
|-
|-
| [[83edo]]
| [[192edo|192]]
| 0.15121
| 155\192
| 1.0459
| +0.0759
| [[166edo]]
| +1.2145
| [[161edo|130\161]]
|-
|-
| [[57edo]]
| [[57edo|57]]
| 0.40485
| 46\57
| 1.9231
| +0.4049
|
| +1.9231
| [[114edo|92\114]], [[171edo|138\171]]
|-
|-
| [[31edo]]
| [[187edo|187]]
| 1.0839
| 151\187
| 2.8003
| -0.1581
| -2.4630
|
|
|-
|-
| [[5edo|&nbsp;<span style="display:none">0</span>5edo]]
| [[31edo|31]]
| 8.8259
| 25\31
| 3.6775
| +1.0839
| [[10edo]], [[15edo]], [[20edo]], [[25edo]]
| +2.8003
| [[62edo|50\62]]
|-
|-
| [[21edo]]
| [[140edo|140]]
| 2.6026
| 113\140
| 4.5547
| +0.2545
| +2.9689
|
|
|-
|-
| [[88edo]]
| [[21edo|21]]
| 0.6441
| 17\21
| 4.7233
| -2.6026
| -4.5547
|
|
|-
|-
| [[47edo]]
| [[88edo|88]]
| 1.3868
| 71\88
| 5.4319
| +0.6441
| [[94edo]]
| +4.7233
|
|-
|-
| [[73edo]]
| [[197edo|197]]
| 1.0371
| 159\197
| 6.3091
| +0.2980
| +4.8920
|
|
|-
|-
| [[36edo]]
| [[47edo|47]]
| 2.1592
| 38\47
| 6.4777
| -1.3868
| [[72edo]]
| -5.4319
|-
| [[16edo]]
| 6.1741
| 8.2321
|
|
|-
|-
| [[67edo]]
| [[73edo|73]]
| 1.6617
| 59\73
| 9.2780
| -1.0371
| -6.3091
|
|
|-
|-
| [[68edo]]
| [[36edo|36]]
| 1.7623
| 29\36
| 9.9865
| +2.1592
| +6.4777
|
|
|-
|-
| [[41edo]]
| [[145edo|145]]
| 2.9722
| 117\145
| 10.1552
| +0.5500
| +6.6464
|
|
|}
|}
<references/>


== See also ==
== See also ==
Retrieved from "https://en.xen.wiki/w/7/4"