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== Context == | |||
Read this first: [[Equal-step_tuning#Alpha-beta-gamma_family_of_equal_divisions]] | |||
== The Alpha-Beta-Gamma family == | |||
{| class="wikitable" | {| class="wikitable" | ||
|+ | |||
|- | |||
! colspan="3" | Tuning !! colspan="2" | Intervals !! colspan="2" | Mappings | |||
|- | |||
! Name | |||
! Equal division | |||
! Steps per octave | |||
! Equave | |||
! SSC pair | |||
! Steps (Equave, SSC pair) | |||
! Errors (cent) | |||
|- | |- | ||
| [[Alpha 3/1]] | |||
| [[3edt|3ed3/1]] | |||
| 1.89278926071437 | |||
| rowspan="3" | 3/1 | | rowspan="3" | 3/1 | ||
| rowspan="3" | 2/1, 3/2 | | rowspan="3" | 2/1, 3/2 | ||
| 3\3<3/1>, 2\3<3/1>, 1\3<3/1> | | 3\3<3/1>, 2\3<3/1>, 1\3<3/1> | ||
| 0, 67. | | 0, 67.970, -67.970 | ||
|- | |- | ||
| [[Beta 3/1]] | |||
| [[5edt|5ed3/1]] | | [[5edt|5ed3/1]] | ||
| | | 3.15464876785729 | ||
| 5\5<3/1>, 3\5<3/1>, 2\5<3/1> | | 5\5<3/1>, 3\5<3/1>, 2\5<3/1> | ||
| 0, -58. | | 0, -58.827, 58.827 | ||
|- | |- | ||
| [[Gamma 3/1]] | |||
| [[8edt|8ed3/1]] | | [[8edt|8ed3/1]] | ||
| 5.04743802857166 | |||
| 5. | |||
| 8\8<3/1>, 5\8<3/1>, 3\8<3/1> | | 8\8<3/1>, 5\8<3/1>, 3\8<3/1> | ||
| 0, -11. | | 0, -11.278, 11.278 | ||
|- | |- | ||
| [[Alpha 2/1]] | |||
| [[5edo|5ed2/1]] | |||
| 5 | |||
| rowspan="3" | 2/1 | | rowspan="3" | 2/1 | ||
| rowspan="3" | 3/2, 4/3 | | rowspan="3" | 3/2, 4/3 | ||
| 5\5<2/1>, 3\5<2/1>, 2\5<2/1> | | 5\5<2/1>, 3\5<2/1>, 2\5<2/1> | ||
| 0, 18. | | 0, 18.045, -18.045 | ||
|- | |- | ||
| [[Beta 2/1]] | |||
| [[7edo|7ed2/1]] | | [[7edo|7ed2/1]] | ||
| 7 | |||
| 7 | |||
| 7\7<2/1>, 4\7<2/1>, 3\7<2/1> | | 7\7<2/1>, 4\7<2/1>, 3\7<2/1> | ||
| 0, -16. | | 0, -16.241, 16.241 | ||
|- | |- | ||
| [[Gamma 2/1]] | |||
| [[12edo|12ed2/1]] | | [[12edo|12ed2/1]] | ||
| 12 | |||
| 12 | |||
| 12\12<2/1>, 7\12<2/1>, 5\12<2/1> | | 12\12<2/1>, 7\12<2/1>, 5\12<2/1> | ||
| 0, -1. | | 0, -1.955, 1.955 | ||
|- | |- | ||
| [[Alpha 5/3]] | |||
| [[7ed5/3]] | |||
| 9.49840814199707 | |||
| rowspan="3" | 5/3 | | rowspan="3" | 5/3 | ||
| rowspan="3" | 4/3, 5/4 | | rowspan="3" | 4/3, 5/4 | ||
| 7\7<5/3>, 4\7<5/3>, 3\7<5/3> | | 7\7<5/3>, 4\7<5/3>, 3\7<5/3> | ||
| 0, 7. | | 0, 7.303, -7.303 | ||
|- | |- | ||
| [[Beta 5/3]] | |||
| [[9ed5/3]] | | [[9ed5/3]] | ||
| 12.2122390397105 | |||
| 12. | |||
| 9\9<5/3>, 5\9<5/3>, 4\9<5/3> | | 9\9<5/3>, 5\9<5/3>, 4\9<5/3> | ||
| 0, -6. | | 0, -6.735, 6.735 | ||
|- | |- | ||
| [[Gamma 5/3]] | |||
| [[16ed5/3]] | | [[16ed5/3]] | ||
| 21.7106471817076 | |||
| 21. | |||
| 16\16<5/3>, 9\16<5/3>, 7\16<5/3> | | 16\16<5/3>, 9\16<5/3>, 7\16<5/3> | ||
| 0, -0. | | 0, -0.593, 0.593 | ||
|- | |- | ||
| [[Carlos Alpha|Alpha 3/2]] | |||
| [[9edf|9ed3/2]] | |||
| 15.3856016221631 | |||
| rowspan="3" | 3/2 | | rowspan="3" | 3/2 | ||
| rowspan="3" | 5/4, 6/5 | | rowspan="3" | 5/4, 6/5 | ||
| 9\9<3/2>, 5\9<3/2>, 4\9<3/2> | | 9\9<3/2>, 5\9<3/2>, 4\9<3/2> | ||
| 0, 3. | | 0, 3.661, -3.661 | ||
|- | |- | ||
| [[Carlos Beta|Beta 3/2]] | |||
| [[11edf|11ed3/2]] | | [[11edf|11ed3/2]] | ||
| 18.8046242048660 | |||
| 18. | |||
| 11\11<3/2>, 6\11<3/2>, 5\11<3/2> | | 11\11<3/2>, 6\11<3/2>, 5\11<3/2> | ||
| 0, -3. | | 0, -3.429, 3.429 | ||
|- | |- | ||
| [[Carlos Gamma|Gamma 3/2]] | |||
| [[20edf|20ed3/2]] | | [[20edf|20ed3/2]] | ||
| 34.1902258270291 | |||
| 34. | |||
| 20\20<3/2>, 11\20<3/2>, 9\20<3/2> | | 20\20<3/2>, 11\20<3/2>, 9\20<3/2> | ||
| 0, -0. | | 0, -0.238, 0.238 | ||
|- | |- | ||
| [[Alpha 7/5]] | |||
| [[11ed7/5]] | |||
| 22.6604698881676 | |||
| rowspan="3" | 7/5 | | rowspan="3" | 7/5 | ||
| rowspan="3" | 6/5, 7/6 | | rowspan="3" | 6/5, 7/6 | ||
| 11\11<7/5>, 6\11<7/5>, 5\11<7/5> | | 11\11<7/5>, 6\11<7/5>, 5\11<7/5> | ||
| 0, 2. | | 0, 2.093, -2.093 | ||
|- | |- | ||
| [[Beta 7/5]] | |||
| [[13ed7/5]] | | [[13ed7/5]] | ||
| 26.7805553223799 | |||
| 26. | |||
| 13\13<7/5>, 7\13<7/5>, 6\13<7/5> | | 13\13<7/5>, 7\13<7/5>, 6\13<7/5> | ||
| 0, -1. | | 0, -1.981, 1.981 | ||
|- | |- | ||
| [[Gamma 7/5]] | |||
| [[24ed7/5]] | | [[24ed7/5]] | ||
| 49.4410252105475 | |||
| 49. | |||
| 24\24<7/5>, 13\24<7/5>, 11\24<7/5> | | 24\24<7/5>, 13\24<7/5>, 11\24<7/5> | ||
| 0, -0. | | 0, -0.114, 0.114 | ||
|- | |- | ||
| [[Alpha 4/3]] | |||
| [[13ed4/3]] | |||
| 31.3224709154917 | |||
| rowspan="3" | 4/3 | | rowspan="3" | 4/3 | ||
| rowspan="3" | 7/6, 8/7 | | rowspan="3" | 7/6, 8/7 | ||
| 13\13<4/3>, 7\13<4/3>, 6\13<4/3> | | 13\13<4/3>, 7\13<4/3>, 6\13<4/3> | ||
| 0, 1. | | 0, 1.307, -1.307 | ||
|- | |- | ||
| [[Beta 4/3]] | |||
| [[15ed4/3]] | | [[15ed4/3]] | ||
| 36.1413125947981 | |||
| 36. | |||
| 15\15<4/3>, 8\15<4/3>, 7\15<4/3> | | 15\15<4/3>, 8\15<4/3>, 7\15<4/3> | ||
| 0, -1. | | 0, -1.247, 1.247 | ||
|- | |- | ||
| [[Gamma 4/3]] | |||
| [[28ed4/3]] | | [[28ed4/3]] | ||
| 67.4637835102899 | |||
| 67. | |||
| 28\28<4/3>, 15\28<4/3>, 13\28<4/3> | | 28\28<4/3>, 15\28<4/3>, 13\28<4/3> | ||
| 0, -0. | | 0, -0.061, 0.061 | ||
|- | |- | ||
| [[Alpha 9/7]] | |||
| [[15ed9/7]] | |||
| 41.3713123417559 | |||
| rowspan="3" | 9/7 | | rowspan="3" | 9/7 | ||
| rowspan="3" | 8/7, 9/8 | | rowspan="3" | 8/7, 9/8 | ||
| 15\15<9/7>, 8\15<9/7>, 7\15<9/7> | | 15\15<9/7>, 8\15<9/7>, 7\15<9/7> | ||
| 0, 0. | | 0, 0.871, -0.871 | ||
|- | |- | ||
| [[Beta 9/7]] | |||
| [[17ed9/7]] | | [[17ed9/7]] | ||
| 46.8874873206567 | |||
| 46. | |||
| 17\17<9/7>, 9\17<9/7>, 8\17<9/7> | | 17\17<9/7>, 9\17<9/7>, 8\17<9/7> | ||
| 0, -0. | | 0, -0.835, 0.835 | ||
|- | |- | ||
| [[Gamma 9/7]] | |||
| [[32ed9/7]] | | [[32ed9/7]] | ||
| 88.2587996624126 | |||
| 88. | |||
| 32\32<9/7>, 17\32<9/7>, 15\32<9/7> | | 32\32<9/7>, 17\32<9/7>, 15\32<9/7> | ||
| 0, -0. | | 0, -0.036, 0.036 | ||
|- | |- | ||
| [[Alpha 5/4]] | |||
| [[17ed5/4]] | |||
| 52.8068232315916 | |||
| rowspan="3" | 5/4 | | rowspan="3" | 5/4 | ||
| rowspan="3" | 9/8, 10/9 | | rowspan="3" | 9/8, 10/9 | ||
| 17\17<5/4>, 9\17<5/4>, 8\17<5/4> | | 17\17<5/4>, 9\17<5/4>, 8\17<5/4> | ||
| 0, 0. | | 0, 0.609, -0.609 | ||
|- | |- | ||
| [[Beta 5/4]] | |||
| [[19ed5/4]] | | [[19ed5/4]] | ||
| 59.0193906706024 | |||
| 59. | |||
| 19\19<5/4>, 10\19<5/4>, 9\19<5/4> | | 19\19<5/4>, 10\19<5/4>, 9\19<5/4> | ||
| 0, -0. | | 0, -0.587, 0.587 | ||
|- | |- | ||
| [[Gamma 5/4]] | |||
| [[36ed5/4]] | | [[36ed5/4]] | ||
| 111.826213902194 | |||
| 111. | |||
| 36\36<5/4>, 19\36<5/4>, 17\36<5/4> | | 36\36<5/4>, 19\36<5/4>, 17\36<5/4> | ||
| 0, -0. | | 0, -0.022, 0.022 | ||
|- | |- | ||
| [[Alpha 11/9]] | |||
| [[19ed11/9]] | |||
| 65.6288971357202 | |||
| rowspan="3" | 11/9 | | rowspan="3" | 11/9 | ||
| rowspan="3" | 10/9, 11/10 | | rowspan="3" | 10/9, 11/10 | ||
| 19\19<11/9>, 10\19<11/9>, 9\19<11/9> | | 19\19<11/9>, 10\19<11/9>, 9\19<11/9> | ||
| 0, 0. | | 0, 0.443, -0.443 | ||
|- | |- | ||
| [[Beta 11/9]] | |||
| [[21ed11/9]] | | [[21ed11/9]] | ||
| 72.5372020973750 | |||
| 72. | |||
| 21\21<11/9>, 11\21<11/9>, 10\21<11/9> | | 21\21<11/9>, 11\21<11/9>, 10\21<11/9> | ||
| 0, -0. | | 0, -0.428, 0.428 | ||
|- | |- | ||
| [[Gamma 11/9]] | |||
| [[40ed11/9]] | | [[40ed11/9]] | ||
| 138.166099233095 | |||
| 138. | |||
| 40\40<11/9>, 21\40<11/9>, 19\40<11/9> | | 40\40<11/9>, 21\40<11/9>, 19\40<11/9> | ||
| 0, -0. | | 0, -0.015, 0.015 | ||
|- | |- | ||
| [[Alpha 6/5]] | |||
| [[21ed6/5]] | |||
| 79.8374643554025 | |||
| rowspan="3" | 6/5 | | rowspan="3" | 6/5 | ||
| rowspan="3" | 11/10, 12/11 | | rowspan="3" | 11/10, 12/11 | ||
| 21\21<6/5>, 11\21<6/5>, 10\21<6/5> | | 21\21<6/5>, 11\21<6/5>, 10\21<6/5> | ||
| 0, 0. | | 0, 0.332, -0.332 | ||
|- | |- | ||
| [[Beta 6/5]] | |||
| [[23ed6/5]] | | [[23ed6/5]] | ||
| 87.4410323892504 | |||
| 87. | |||
| 23\23<6/5>, 12\23<6/5>, 11\23<6/5> | | 23\23<6/5>, 12\23<6/5>, 11\23<6/5> | ||
| 0, -0. | | 0, -0.322, 0.322 | ||
|- | |- | ||
| [[Gamma 6/5]] | |||
| [[44ed6/5]] | | [[44ed6/5]] | ||
| 167.278496744653 | |||
| 167. | |||
| 44\44<6/5>, 23\44<6/5>, 21\44<6/5> | | 44\44<6/5>, 23\44<6/5>, 21\44<6/5> | ||
| 0, -0. | | 0, -0.010, 0.010 | ||
|- | |- | ||
| [[Alpha 13/11]] | |||
| [[23ed13/11]] | |||
| 95.4324773621886 | |||
| rowspan="3" | 13/11 | | rowspan="3" | 13/11 | ||
| rowspan="3" | 12/11, 13/12 | | rowspan="3" | 12/11, 13/12 | ||
| 23\23<13/11>, 12\23<13/11>, 11\23<13/11> | | 23\23<13/11>, 12\23<13/11>, 11\23<13/11> | ||
| 0, 0. | | 0, 0.255, -0.255 | ||
|- | |- | ||
| [[Beta 13/11]] | |||
| [[25ed13/11]] | | [[25ed13/11]] | ||
| 103.730953654553 | |||
| 103. | |||
| 25\25<13/11>, 13\25<13/11>, 12\25<13/11> | | 25\25<13/11>, 13\25<13/11>, 12\25<13/11> | ||
| 0, -0. | | 0, -0.248, 0.248 | ||
|- | |- | ||
| [[Gamma 13/11]] | |||
| [[48ed13/11]] | | [[48ed13/11]] | ||
| 199.163431016741 | |||
| 199. | |||
| 48\48<13/11>, 25\48<13/11>, 23\48<13/11> | | 48\48<13/11>, 25\48<13/11>, 23\48<13/11> | ||
| 0, -0. | | 0, -0.007, 0.007 | ||
|- | |- | ||
| [[Alpha 7/6]] | |||
| [[25ed7/6]] | |||
| 112.413902640048 | |||
| rowspan="3" | 7/6 | | rowspan="3" | 7/6 | ||
| rowspan="3" | 13/12, 14/13 | | rowspan="3" | 13/12, 14/13 | ||
| 25\25<7/6>, 13\25<7/6>, 12\25<7/6> | | 25\25<7/6>, 13\25<7/6>, 12\25<7/6> | ||
| 0, 0. | | 0, 0.200, -0.200 | ||
|- | |- | ||
| [[Beta 7/6]] | |||
| [[27ed7/6]] | | [[27ed7/6]] | ||
| 121.407014851252 | |||
| 121. | |||
| 27\27<7/6>, 14\27<7/6>, 13\27<7/6> | | 27\27<7/6>, 14\27<7/6>, 13\27<7/6> | ||
| 0, -0. | | 0, -0.195, 0.195 | ||
|- | |- | ||
| [[Gamma 7/6]] | |||
| [[52ed7/6]] | | [[52ed7/6]] | ||
| 233.820917491300 | |||
| 233. | |||
| 52\52<7/6>, 27\52<7/6>, 25\52<7/6> | | 52\52<7/6>, 27\52<7/6>, 25\52<7/6> | ||
| 0, -0. | | 0, -0.005, 0.005 | ||
|- | |- | ||
| [[Alpha 15/13]] | |||
| [[27ed15/13]] | |||
| 130.781715879411 | |||
| rowspan="3" | 15/13 | | rowspan="3" | 15/13 | ||
| rowspan="3" | 14/13, 15/14 | | rowspan="3" | 14/13, 15/14 | ||
| 27\27<15/13>, 14\27<15/13>, 13\27<15/13> | | 27\27<15/13>, 14\27<15/13>, 13\27<15/13> | ||
| 0, 0. | | 0, 0.160, -0.160 | ||
|- | |- | ||
| [[Beta 15/13]] | |||
| [[29ed15/13]] | | [[29ed15/13]] | ||
| 140.469250388997 | |||
| 140. | |||
| 29\29<15/13>, 15\29<15/13>, 14\29<15/13> | | 29\29<15/13>, 15\29<15/13>, 14\29<15/13> | ||
| 0, -0. | | 0, -0.156, 0.156 | ||
|- | |- | ||
| [[Gamma 15/13]] | |||
| [[56ed15/13]] | | [[56ed15/13]] | ||
| 271.250966268408 | |||
| 271. | |||
| 56\56<15/13>, 29\56<15/13>, 27\56<15/13> | | 56\56<15/13>, 29\56<15/13>, 27\56<15/13> | ||
| 0, -0. | | 0, -0.004, 0.004 | ||
|- | |- | ||
| [[Alpha 8/7]] | |||
| [[29ed8/7]] | |||
| 150.535899020849 | |||
| rowspan="3" | 8/7 | | rowspan="3" | 8/7 | ||
| rowspan="3" | 15/14, 16/15 | | rowspan="3" | 15/14, 16/15 | ||
| 29\29<8/7>, 15\29<8/7>, 14\29<8/7> | | 29\29<8/7>, 15\29<8/7>, 14\29<8/7> | ||
| 0, 0. | | 0, 0.130, -0.130 | ||
|- | |- | ||
| [[Beta 8/7]] | |||
| [[31ed8/7]] | | [[31ed8/7]] | ||
| 160.917685160217 | |||
| 160. | |||
| 31\31<8/7>, 16\31<8/7>, 15\31<8/7> | | 31\31<8/7>, 16\31<8/7>, 15\31<8/7> | ||
| 0, -0. | | 0, -0.127, 0.127 | ||
|- | |- | ||
| [[Gamma 8/7]] | |||
| [[60ed8/7]] | | [[60ed8/7]] | ||
| 311.453584181066 | |||
| 311. | |||
| 60\60<8/7>, 31\60<8/7>, 29\60<8/7> | | 60\60<8/7>, 31\60<8/7>, 29\60<8/7> | ||
| 0, -0. | | 0, -0.003, 0.003 | ||
|} | |} | ||
As a | == The converging Alpha-Beta-Gamma sequence == | ||
As a fact, for each <math>n\ge 2</math>, equal divisions of <math>R_n=\dfrac{n+1}{n-1}</math> where low errors appear for <math>S_n=\dfrac{n+1}{n}</math> and <math>B_n=\dfrac{n}{n-1}</math> forms a converging sequence and pattern, with the happy equal divisions of <math>R_n</math> being: | |||
* '''Alpha:''' <math>k_\alpha=2n-1</math> | |||
* '''Beta:''' <math>k_\beta=2n+1</math> | |||
* '''Gamma:''' <math>k_\gamma=4n=k_\alpha+k_\beta</math> | |||
In this sequence, the errors are lower and lower. | |||
{{todo|Why this pattern|inline=1|comment=Explain why divisions of ratios where low errors appear for successive superparticular complementary pair make this pattern appears.}} | |||
{| class="wikitable sortable right-1 left-2 right-3 left-4 right-5 left-6 right-7 left-8 right-9 left-10 right-11 left-12 right-13 left-14 right-15 left-16 right-17 left-18 right-19 left-20" | {| class="wikitable sortable right-1 left-2 right-3 left-4 right-5 left-6 right-7 left-8 right-9 left-10 right-11 left-12 right-13 left-14 right-15 left-16 right-17 left-18 right-19 left-20" | ||
Latest revision as of 00:21, 28 October 2025
Context
Read this first: Equal-step_tuning#Alpha-beta-gamma_family_of_equal_divisions
The Alpha-Beta-Gamma family
| Tuning | Intervals | Mappings | ||||
|---|---|---|---|---|---|---|
| Name | Equal division | Steps per octave | Equave | SSC pair | Steps (Equave, SSC pair) | Errors (cent) |
| Alpha 3/1 | 3ed3/1 | 1.89278926071437 | 3/1 | 2/1, 3/2 | 3\3<3/1>, 2\3<3/1>, 1\3<3/1> | 0, 67.970, -67.970 |
| Beta 3/1 | 5ed3/1 | 3.15464876785729 | 5\5<3/1>, 3\5<3/1>, 2\5<3/1> | 0, -58.827, 58.827 | ||
| Gamma 3/1 | 8ed3/1 | 5.04743802857166 | 8\8<3/1>, 5\8<3/1>, 3\8<3/1> | 0, -11.278, 11.278 | ||
| Alpha 2/1 | 5ed2/1 | 5 | 2/1 | 3/2, 4/3 | 5\5<2/1>, 3\5<2/1>, 2\5<2/1> | 0, 18.045, -18.045 |
| Beta 2/1 | 7ed2/1 | 7 | 7\7<2/1>, 4\7<2/1>, 3\7<2/1> | 0, -16.241, 16.241 | ||
| Gamma 2/1 | 12ed2/1 | 12 | 12\12<2/1>, 7\12<2/1>, 5\12<2/1> | 0, -1.955, 1.955 | ||
| Alpha 5/3 | 7ed5/3 | 9.49840814199707 | 5/3 | 4/3, 5/4 | 7\7<5/3>, 4\7<5/3>, 3\7<5/3> | 0, 7.303, -7.303 |
| Beta 5/3 | 9ed5/3 | 12.2122390397105 | 9\9<5/3>, 5\9<5/3>, 4\9<5/3> | 0, -6.735, 6.735 | ||
| Gamma 5/3 | 16ed5/3 | 21.7106471817076 | 16\16<5/3>, 9\16<5/3>, 7\16<5/3> | 0, -0.593, 0.593 | ||
| Alpha 3/2 | 9ed3/2 | 15.3856016221631 | 3/2 | 5/4, 6/5 | 9\9<3/2>, 5\9<3/2>, 4\9<3/2> | 0, 3.661, -3.661 |
| Beta 3/2 | 11ed3/2 | 18.8046242048660 | 11\11<3/2>, 6\11<3/2>, 5\11<3/2> | 0, -3.429, 3.429 | ||
| Gamma 3/2 | 20ed3/2 | 34.1902258270291 | 20\20<3/2>, 11\20<3/2>, 9\20<3/2> | 0, -0.238, 0.238 | ||
| Alpha 7/5 | 11ed7/5 | 22.6604698881676 | 7/5 | 6/5, 7/6 | 11\11<7/5>, 6\11<7/5>, 5\11<7/5> | 0, 2.093, -2.093 |
| Beta 7/5 | 13ed7/5 | 26.7805553223799 | 13\13<7/5>, 7\13<7/5>, 6\13<7/5> | 0, -1.981, 1.981 | ||
| Gamma 7/5 | 24ed7/5 | 49.4410252105475 | 24\24<7/5>, 13\24<7/5>, 11\24<7/5> | 0, -0.114, 0.114 | ||
| Alpha 4/3 | 13ed4/3 | 31.3224709154917 | 4/3 | 7/6, 8/7 | 13\13<4/3>, 7\13<4/3>, 6\13<4/3> | 0, 1.307, -1.307 |
| Beta 4/3 | 15ed4/3 | 36.1413125947981 | 15\15<4/3>, 8\15<4/3>, 7\15<4/3> | 0, -1.247, 1.247 | ||
| Gamma 4/3 | 28ed4/3 | 67.4637835102899 | 28\28<4/3>, 15\28<4/3>, 13\28<4/3> | 0, -0.061, 0.061 | ||
| Alpha 9/7 | 15ed9/7 | 41.3713123417559 | 9/7 | 8/7, 9/8 | 15\15<9/7>, 8\15<9/7>, 7\15<9/7> | 0, 0.871, -0.871 |
| Beta 9/7 | 17ed9/7 | 46.8874873206567 | 17\17<9/7>, 9\17<9/7>, 8\17<9/7> | 0, -0.835, 0.835 | ||
| Gamma 9/7 | 32ed9/7 | 88.2587996624126 | 32\32<9/7>, 17\32<9/7>, 15\32<9/7> | 0, -0.036, 0.036 | ||
| Alpha 5/4 | 17ed5/4 | 52.8068232315916 | 5/4 | 9/8, 10/9 | 17\17<5/4>, 9\17<5/4>, 8\17<5/4> | 0, 0.609, -0.609 |
| Beta 5/4 | 19ed5/4 | 59.0193906706024 | 19\19<5/4>, 10\19<5/4>, 9\19<5/4> | 0, -0.587, 0.587 | ||
| Gamma 5/4 | 36ed5/4 | 111.826213902194 | 36\36<5/4>, 19\36<5/4>, 17\36<5/4> | 0, -0.022, 0.022 | ||
| Alpha 11/9 | 19ed11/9 | 65.6288971357202 | 11/9 | 10/9, 11/10 | 19\19<11/9>, 10\19<11/9>, 9\19<11/9> | 0, 0.443, -0.443 |
| Beta 11/9 | 21ed11/9 | 72.5372020973750 | 21\21<11/9>, 11\21<11/9>, 10\21<11/9> | 0, -0.428, 0.428 | ||
| Gamma 11/9 | 40ed11/9 | 138.166099233095 | 40\40<11/9>, 21\40<11/9>, 19\40<11/9> | 0, -0.015, 0.015 | ||
| Alpha 6/5 | 21ed6/5 | 79.8374643554025 | 6/5 | 11/10, 12/11 | 21\21<6/5>, 11\21<6/5>, 10\21<6/5> | 0, 0.332, -0.332 |
| Beta 6/5 | 23ed6/5 | 87.4410323892504 | 23\23<6/5>, 12\23<6/5>, 11\23<6/5> | 0, -0.322, 0.322 | ||
| Gamma 6/5 | 44ed6/5 | 167.278496744653 | 44\44<6/5>, 23\44<6/5>, 21\44<6/5> | 0, -0.010, 0.010 | ||
| Alpha 13/11 | 23ed13/11 | 95.4324773621886 | 13/11 | 12/11, 13/12 | 23\23<13/11>, 12\23<13/11>, 11\23<13/11> | 0, 0.255, -0.255 |
| Beta 13/11 | 25ed13/11 | 103.730953654553 | 25\25<13/11>, 13\25<13/11>, 12\25<13/11> | 0, -0.248, 0.248 | ||
| Gamma 13/11 | 48ed13/11 | 199.163431016741 | 48\48<13/11>, 25\48<13/11>, 23\48<13/11> | 0, -0.007, 0.007 | ||
| Alpha 7/6 | 25ed7/6 | 112.413902640048 | 7/6 | 13/12, 14/13 | 25\25<7/6>, 13\25<7/6>, 12\25<7/6> | 0, 0.200, -0.200 |
| Beta 7/6 | 27ed7/6 | 121.407014851252 | 27\27<7/6>, 14\27<7/6>, 13\27<7/6> | 0, -0.195, 0.195 | ||
| Gamma 7/6 | 52ed7/6 | 233.820917491300 | 52\52<7/6>, 27\52<7/6>, 25\52<7/6> | 0, -0.005, 0.005 | ||
| Alpha 15/13 | 27ed15/13 | 130.781715879411 | 15/13 | 14/13, 15/14 | 27\27<15/13>, 14\27<15/13>, 13\27<15/13> | 0, 0.160, -0.160 |
| Beta 15/13 | 29ed15/13 | 140.469250388997 | 29\29<15/13>, 15\29<15/13>, 14\29<15/13> | 0, -0.156, 0.156 | ||
| Gamma 15/13 | 56ed15/13 | 271.250966268408 | 56\56<15/13>, 29\56<15/13>, 27\56<15/13> | 0, -0.004, 0.004 | ||
| Alpha 8/7 | 29ed8/7 | 150.535899020849 | 8/7 | 15/14, 16/15 | 29\29<8/7>, 15\29<8/7>, 14\29<8/7> | 0, 0.130, -0.130 |
| Beta 8/7 | 31ed8/7 | 160.917685160217 | 31\31<8/7>, 16\31<8/7>, 15\31<8/7> | 0, -0.127, 0.127 | ||
| Gamma 8/7 | 60ed8/7 | 311.453584181066 | 60\60<8/7>, 31\60<8/7>, 29\60<8/7> | 0, -0.003, 0.003 | ||
The converging Alpha-Beta-Gamma sequence
As a fact, for each [math]\displaystyle{ n\ge 2 }[/math], equal divisions of [math]\displaystyle{ R_n=\dfrac{n+1}{n-1} }[/math] where low errors appear for [math]\displaystyle{ S_n=\dfrac{n+1}{n} }[/math] and [math]\displaystyle{ B_n=\dfrac{n}{n-1} }[/math] forms a converging sequence and pattern, with the happy equal divisions of [math]\displaystyle{ R_n }[/math] being:
- Alpha: [math]\displaystyle{ k_\alpha=2n-1 }[/math]
- Beta: [math]\displaystyle{ k_\beta=2n+1 }[/math]
- Gamma: [math]\displaystyle{ k_\gamma=4n=k_\alpha+k_\beta }[/math]
In this sequence, the errors are lower and lower.
| Todo: Why this pattern
Explain why divisions of ratios where low errors appear for successive superparticular complementary pair make this pattern appears. |