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More comma sequence thoughts

🔗Gene Ward Smith <gwsmith@svpal.org>

3/4/2005 8:58:50 PM

I'd proposed comma sequences as unique identifiers for linear
temperaments which displayed their family relationships, but there
were some problems with the definition. Another approach is to do what
I just did with equal temperaments; first use reduction to Hermite
normal form, giving a comma sequence whose first element is a 5-limit
comma. Then reduce the remaining commas with respect to this comma,
getting a list of, mostly, 5-limit bridge commas. Family similarity is
reflected in identity of the first n commas. Below is a list of comma
sequence identifiers for 11-limit linear temperaments.

[36, 54, 36, 18, 2, -44, -96, -68, -145, -74]
[7629394531250/7625597484987, 4375/4374, 1890625/1889568]
rms: .198798 comp: 36.000000

[6, -7, -2, 15, -25, -20, 3, 15, 59, 49]
[34171875/33554432, 225/224, 4125/4096]
rms: 1.901466 comp: 12.351981

[12, 22, -4, -6, 7, -40, -51, -71, -90, -3]
[31381059609/31250000000, 4375/4374, 8019/8000]
rms: 1.249417 comp: 19.063803

[14, 6, 74, 52, -23, 78, 34, 155, 100, -110]
[6115295232/6103515625, 4375/4374, 5632/5625]
rms: .352551 comp: 42.006802

[12, -2, 20, -6, -31, -2, -51, 52, -7, -86]
[2197265625/2147483648, 225/224, 4125/4096]
rms: 1.584514 comp: 17.952318

[9, 5, -3, 7, -13, -30, -20, -21, -1, 30]
[1990656/1953125, 126/125, 3168/3125]
rms: 4.418576 comp: 10.525479

[18, 15, -6, 9, -18, -60, -48, -56, -31, 46]
[15625/15552, 1029/1024, 385/384]
rms: 1.357052 comp: 21.152507

[2, -4, -4, -12, -11, -12, -26, 2, -14, -20]
[2048/2025, 64/63, 100/99]
rms: 9.552922 comp: 8.349508

[24, 32, 40, 24, -5, -4, -45, 3, -55, -71]
[59604644775390625/59296646043258912, 4375/4374, 1953125/1948617]
rms: .768706 comp: 23.421602

[3, 0, -6, -6, -7, -18, -20, -14, -14, 4]
[128/125, 64/63, 100/99]
rms: 12.772525 comp: 6.989788

[7, -3, 8, 2, -21, -7, -21, 27, 15, -22]
[2109375/2097152, 225/224, 4125/4096]
rms: 5.548615 comp: 8.860023

[2, -4, -16, -24, -11, -31, -45, -26, -42, -12]
[2048/2025, 126/125, 3168/3125]
rms: 3.182070 comp: 16.388149

[1, 4, 10, 18, 4, 13, 25, 12, 28, 16]
[81/80, 126/125, 3168/3125]
rms: 6.584357 comp: 10.155927

[1, 4, 10, -13, 4, 13, -24, 12, -44, -71]
[81/80, 126/125, 4125/4096]
rms: 5.644271 comp: 11.093756

[5, 1, 12, -8, -10, 5, -30, 25, -22, -64]
[3125/3072, 225/224, 100/99]
rms: 4.730404 comp: 10.620062

[0, 12, 24, 36, 19, 38, 57, 22, 42, 18]
[531441/524288, 225/224, 8019/8000]
rms: 1.886540 comp: 22.219682

[38, -3, 8, 64, -93, -94, -30, 27, 159, 152]
[9903520314283042199192993792/9822542779147624969482421875,
29360128/29296875, 5632/5625]
rms: .383188 comp: 48.844505

[1, -1, 3, 4, -4, 2, 3, 10, 13, 1]
[16/15, 28/27, 55/54]
rms: 44.341252 comp: 2.725541

[2, 3, 1, -2, 0, -4, -10, -6, -15, -9]
[27/25, 21/20, 33/32]
rms: 40.160927 comp: 3.116775

[6, 5, 22, -21, -6, 18, -54, 37, -66, -135]
[15625/15552, 225/224, 4125/4096]
rms: 1.697137 comp: 20.989793

[10, 9, 7, 25, -9, -17, 5, -9, 27, 46]
[10077696/9765625, 126/125, 3168/3125]
rms: 3.316530 comp: 13.063034

[15, -2, -5, 22, -38, -50, -17, -6, 58, 79]
[274877906944/274658203125, 65625/65536, 5632/5625]
rms: 1.772097 comp: 20.707142

[1, 4, -2, -6, 4, -6, -13, -16, -28, -10]
[81/80, 36/35, 288/275]
rms: 18.933027 comp: 5.099020

[1, -3, -4, -1, -7, -9, -5, -1, 8, 11]
[135/128, 21/20, 33/32]
rms: 36.627981 comp: 3.380617

[1, -8, -14, -18, -15, -25, -32, -10, -14, -2]
[32805/32768, 225/224, 100/99]
rms: 5.290179 comp: 12.432676

[0, 0, 7, 0, 0, 11, 0, 16, 0, -24]
[2187/2048, 81/80, 33/32]
rms: 22.636347 comp: 4.183300

[24, 20, 16, -12, -24, -42, -102, -19, -97, -89]
[15625/15552, 2401/2400, 385/384]
rms: 1.086899 comp: 29.626243

[12, 34, 20, 30, 26, -2, 6, -49, -48, 15]
[129140163/128000000, 19683/19600, 8019/8000]
rms: 1.462302 comp: 17.952318

[23, -1, 13, 42, -55, -44, -13, 33, 101, 73]
[36028797018963968/35762786865234375, 29360128/29296875, 5632/5625]
rms: 1.013640 comp: 29.051678

[3, 17, -1, -13, 20, -10, -31, -50, -89, -33]
[131072000/129140163, 5120/5103, 2200/2187]
rms: 3.005389 comp: 14.320315

[3, -5, -6, -1, -15, -18, -12, 0, 15, 18]
[32768/30375, 64/63, 512/495]
rms: 13.781284 comp: 6.676184

[1, -8, -14, 23, -15, -25, 33, -10, 81, 113]
[32805/32768, 225/224, 2200/2187]
rms: 2.447559 comp: 18.413892

[6, -19, -26, -21, -44, -58, -54, -7, 17, 31]
[18160335421875/17592186044416, 225/224, 91125/90112]
rms: 1.883084 comp: 23.311554

[9, 10, -3, 2, -5, -30, -28, -35, -30, 16]
[1953125/1889568, 875/864, 100/99]
rms: 5.302952 comp: 11.119481

[2, -2, -2, 0, -8, -9, -7, 1, 7, 7]
[16/15, 50/49, 77/75]
rms: 46.396405 comp: 3.380617

[2, -16, -40, -60, -30, -69, -102, -48, -84, -30]
[32805/32768, 3136/3125, 5632/5625]
rms: .979643 comp: 38.500464

[3, 5, -6, 4, 1, -18, -4, -28, -8, 32]
[250/243, 64/63, 55/54]
rms: 11.793935 comp: 6.430952

[6, 0, 3, 3, -14, -12, -16, 7, 7, -2]
[128/125, 49/48, 77/75]
rms: 14.472091 comp: 6.414270

[0, 5, 0, -5, 8, 0, -8, -14, -29, -14]
[256/243, 28/27, 55/54]
rms: 22.089446 comp: 4.629100

[2, 8, 8, 12, 8, 7, 12, -4, 0, 6]
[81/80, 50/49, 45/44]
rms: 13.344995 comp: 6.502747

[4, 2, 2, -4, -6, -8, -20, -1, -16, -18]
[25/24, 49/48, 33/32]
rms: 22.632565 comp: 5.756983

[6, -12, 10, -14, -33, -1, -43, 57, 9, -74]
[2048/2025, 1728/1715, 540/539]
rms: 2.986631 comp: 16.212870

[42, 47, 34, 33, -23, -64, -93, -53, -86, -25]
[227373675443232059478759765625/223043140842065783739956330496,
68359375/68024448, 30517578125/30304891584]
rms: .579520 comp: 38.060103

[5, -11, -12, -3, -29, -33, -22, 3, 31, 33]
[553584375/536870912, 225/224, 66825/65536]
rms: 5.154394 comp: 12.671678

[8, 6, 6, -4, -9, -13, -34, -3, -30, -32]
[390625/373248, 875/864, 100/99]
rms: 8.163015 comp: 9.856108

[17, 6, 15, 27, -30, -24, -16, 18, 42, 24]
[782757789696/762939453125, 110592/109375, 6912/6875]
rms: 2.412281 comp: 17.968226

[1, 4, 3, -1, 4, 2, -5, -4, -16, -13]
[81/80, 21/20, 33/32]
rms: 47.548543 comp: 2.725541

[1, 4, 10, 6, 4, 13, 6, 12, 0, -18]
[81/80, 126/125, 45/44]
rms: 18.965800 comp: 5.424811

[1, 33, 27, -18, 50, 40, -32, -30, -156, -144]
[5629499534213120/5559060566555523, 5120/5103, 14417920/14348907]
rms: 1.115730 comp: 27.846518

[3, -24, -1, 28, -45, -10, 34, 65, 148, 82]
[32805/32768, 1029/1024, 385/384]
rms: 1.499792 comp: 24.323710

[2, -4, -4, 0, -11, -12, -7, 2, 14, 14]
[2048/2025, 64/63, 45/44]
rms: 27.006882 comp: 4.659859

[18, 39, 42, 9, 20, 16, -48, -12, -114, -120]
[4052555153018976267/4000000000000000000, 100442349/100000000, 8019/8000]
rms: 1.049818 comp: 25.150973

[3, 12, -1, -8, 12, -10, -23, -36, -60, -19]
[81/80, 1029/1024, 385/384]
rms: 6.456792 comp: 9.895887

[4, 4, 4, 0, -3, -5, -14, -2, -14, -14]
[648/625, 36/35, 100/99]
rms: 27.265894 comp: 4.276180

[13, -10, 6, 17, -46, -27, -18, 42, 74, 27]
[72081298828125/70368744177664, 225/224, 4125/4096]
rms: 2.438407 comp: 18.413892

[18, -9, 18, 9, -56, -22, -48, 67, 52, -37]
[75084686279296875/72057594037927936, 225/224, 4125/4096]
rms: 1.689101 comp: 22.564194

[30, 13, 14, 3, -49, -62, -99, -4, -38, -40]
[931322574615478515625/897524058588526411776, 390625/387072,
21484375/21233664]
rms: 1.179375 comp: 31.559468

[6, 5, 3, -2, -6, -12, -24, -7, -22, -16]
[15625/15552, 126/125, 100/99]
rms: 14.472383 comp: 7.050836

[5, 3, 7, 4, -7, -3, -11, 8, -1, -13]
[3456/3125, 36/35, 132/125]
rms: 19.644403 comp: 4.840307

[4, 2, 2, 10, -6, -8, 2, -1, 16, 21]
[25/24, 49/48, 45/44]
rms: 19.453599 comp: 5.580579

[2, 1, 6, 5, -3, 4, 1, 11, 8, -7]
[25/24, 28/27, 45/44]
rms: 37.484665 comp: 3.422614

[1, -1, 3, -4, -4, 2, -10, 10, -6, -22]
[16/15, 28/27, 100/99]
rms: 43.037876 comp: 3.625308

[16, 2, 5, 40, -34, -37, 8, 6, 86, 95]
[393216/390625, 3136/3125, 5632/5625]
rms: 1.764586 comp: 24.161658

[10, 26, -34, -28, 18, -82, -79, -152, -155, 39]
[1600000/1594323, 4375/4374, 16384/16335]
rms: .881985 comp: 36.410360

[1, 4, -2, -1, 4, -6, -5, -16, -16, 4]
[81/80, 36/35, 33/32]
rms: 39.863722 comp: 3.150964

[2, 1, -4, 5, -3, -12, 1, -12, 8, 28]
[25/24, 64/63, 45/44]
rms: 27.107413 comp: 4.659859

[2, -4, -4, 10, -11, -12, 9, 2, 37, 42]
[2048/2025, 64/63, 55/54]
rms: 12.267148 comp: 7.764388

[6, 29, -2, -21, 32, -20, -54, -86, -149, -52]
[68630377364883/67108864000000, 413343/409600, 177147/176000]
rms: 1.555238 comp: 24.177912

[2, -6, 1, -2, -14, -4, -10, 19, 16, -9]
[135/128, 49/48, 33/32]
rms: 19.984071 comp: 5.077964

[18, -14, 30, -20, -64, -3, -94, 109, 2, -160]
[4294967296/4271484375, 6144/6125, 5632/5625]
rms: 1.000617 comp: 33.670674

[3, 5, 9, 4, 1, 6, -4, 7, -8, -20]
[250/243, 28/27, 55/54]
rms: 22.129858 comp: 4.342481