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  • Gaussian Quadrature Weights and Abscissae

    Gaussian Quadrature Weights and Abscissae

    https://pomax.github.io/bezierinfo/legendre-gauss.html

    This page is a tabulation of weights and abscissae for use in performing Legendre-Gauss quadrature integral approximation, which tries to solve the following function

    by picking approximate values for nwi and xi. While only defined for the interval [-1,1], this is actually a universal function, because we can convert the limits of integration for any interval [a,b] to the Legendre-Gauss interval [-1,1]:

    The summation function is called the Legendre-Gauss quadrature rule because the abscissae xi in the Gauss quadrature function for [-1,1] are defined as the roots of the Legendre polynomial for n:

    with the weights wi coming from the following function:

    (The procedure is explained in more detail here, with a very accessible video lecture on the theory behind the Gauss quadrature rule here)

    The tables provided here give the values for xi and wi for n=2 through n=64, with an internal decimal precision of 256, limited to 16 decimals due to floating point number limits in PHP. These tables were made using the numbers that are generated by the following series of Mathematica instructions:

        symboliclegendre[n_, x_] := Solve[LegendreP[n, x] == 0];
        legendreprime[n_, a_] := D[LegendreP[n, x], x] /. x -> a;
        weights[n_, x_] := 2/((1 - x^2) legendreprime[n, x]^2);
    
        (*how many terms should be generated*)
        h = 64;
    
        (* what numerical precision is desired? *)
        precision = 256;
    
        str = OpenWrite["lgvalues.txt"];
        Write[str, "abcissae"];
        Do[Write[str]; Write[str, n]; Write[str];
          nlist = symboliclegendre[n, x];
          xnlist = x /. nlist;
          Do[Write[str, N[Part[xnlist, i], precision]], {i, Length[xnlist]}];, {n, 2, h}];
        Write[str, "weights"];
        Do[Write[str]; Write[str, n]; Write[str];
          slist := symboliclegendre[n, x];
          xslist = x /. slist;
          Do[Write[str, N[weights[n, Part[xslist, i]], precision]], {i, Length[xslist]}];, {n, 2, h}];
        Close[str];

    If you need higher precision than is presented on this web page you can either download the abscissae and weights files below, or you can run this program in Mathematica yourself, with higher precision and/or higher h values.

    • abscissae (607KB, easily converted to not-PHP)
    • weights (615KB, easily converted to not-PHP)

    Weights and Abscissae Tables for n=2 to n=64

    n = 2

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 1.0000000000000000 -0.5773502691896257
    2 1.0000000000000000 0.5773502691896257

    n = 3

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.8888888888888888 0.0000000000000000
    2 0.5555555555555556 -0.7745966692414834
    3 0.5555555555555556 0.7745966692414834

    n = 4

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.6521451548625461 -0.3399810435848563
    2 0.6521451548625461 0.3399810435848563
    3 0.3478548451374538 -0.8611363115940526
    4 0.3478548451374538 0.8611363115940526

    n = 5

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.5688888888888889 0.0000000000000000
    2 0.4786286704993665 -0.5384693101056831
    3 0.4786286704993665 0.5384693101056831
    4 0.2369268850561891 -0.9061798459386640
    5 0.2369268850561891 0.9061798459386640

    n = 6

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.3607615730481386 0.6612093864662645
    2 0.3607615730481386 -0.6612093864662645
    3 0.4679139345726910 -0.2386191860831969
    4 0.4679139345726910 0.2386191860831969
    5 0.1713244923791704 -0.9324695142031521
    6 0.1713244923791704 0.9324695142031521

    n = 7

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.4179591836734694 0.0000000000000000
    2 0.3818300505051189 0.4058451513773972
    3 0.3818300505051189 -0.4058451513773972
    4 0.2797053914892766 -0.7415311855993945
    5 0.2797053914892766 0.7415311855993945
    6 0.1294849661688697 -0.9491079123427585
    7 0.1294849661688697 0.9491079123427585

    n = 8

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.3626837833783620 -0.1834346424956498
    2 0.3626837833783620 0.1834346424956498
    3 0.3137066458778873 -0.5255324099163290
    4 0.3137066458778873 0.5255324099163290
    5 0.2223810344533745 -0.7966664774136267
    6 0.2223810344533745 0.7966664774136267
    7 0.1012285362903763 -0.9602898564975363
    8 0.1012285362903763 0.9602898564975363

    n = 9

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.3302393550012598 0.0000000000000000
    2 0.1806481606948574 -0.8360311073266358
    3 0.1806481606948574 0.8360311073266358
    4 0.0812743883615744 -0.9681602395076261
    5 0.0812743883615744 0.9681602395076261
    6 0.3123470770400029 -0.3242534234038089
    7 0.3123470770400029 0.3242534234038089
    8 0.2606106964029354 -0.6133714327005904
    9 0.2606106964029354 0.6133714327005904

    n = 10

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.2955242247147529 -0.1488743389816312
    2 0.2955242247147529 0.1488743389816312
    3 0.2692667193099963 -0.4333953941292472
    4 0.2692667193099963 0.4333953941292472
    5 0.2190863625159820 -0.6794095682990244
    6 0.2190863625159820 0.6794095682990244
    7 0.1494513491505806 -0.8650633666889845
    8 0.1494513491505806 0.8650633666889845
    9 0.0666713443086881 -0.9739065285171717
    10 0.0666713443086881 0.9739065285171717

    n = 11

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.2729250867779006 0.0000000000000000
    2 0.2628045445102467 -0.2695431559523450
    3 0.2628045445102467 0.2695431559523450
    4 0.2331937645919905 -0.5190961292068118
    5 0.2331937645919905 0.5190961292068118
    6 0.1862902109277343 -0.7301520055740494
    7 0.1862902109277343 0.7301520055740494
    8 0.1255803694649046 -0.8870625997680953
    9 0.1255803694649046 0.8870625997680953
    10 0.0556685671161737 -0.9782286581460570
    11 0.0556685671161737 0.9782286581460570

    n = 12

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.2491470458134028 -0.1252334085114689
    2 0.2491470458134028 0.1252334085114689
    3 0.2334925365383548 -0.3678314989981802
    4 0.2334925365383548 0.3678314989981802
    5 0.2031674267230659 -0.5873179542866175
    6 0.2031674267230659 0.5873179542866175
    7 0.1600783285433462 -0.7699026741943047
    8 0.1600783285433462 0.7699026741943047
    9 0.1069393259953184 -0.9041172563704749
    10 0.1069393259953184 0.9041172563704749
    11 0.0471753363865118 -0.9815606342467192
    12 0.0471753363865118 0.9815606342467192

    n = 13

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.2325515532308739 0.0000000000000000
    2 0.2262831802628972 -0.2304583159551348
    3 0.2262831802628972 0.2304583159551348
    4 0.2078160475368885 -0.4484927510364469
    5 0.2078160475368885 0.4484927510364469
    6 0.1781459807619457 -0.6423493394403402
    7 0.1781459807619457 0.6423493394403402
    8 0.1388735102197872 -0.8015780907333099
    9 0.1388735102197872 0.8015780907333099
    10 0.0921214998377285 -0.9175983992229779
    11 0.0921214998377285 0.9175983992229779
    12 0.0404840047653159 -0.9841830547185881
    13 0.0404840047653159 0.9841830547185881

    n = 14

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.2152638534631578 -0.1080549487073437
    2 0.2152638534631578 0.1080549487073437
    3 0.2051984637212956 -0.3191123689278897
    4 0.2051984637212956 0.3191123689278897
    5 0.1855383974779378 -0.5152486363581541
    6 0.1855383974779378 0.5152486363581541
    7 0.1572031671581935 -0.6872929048116855
    8 0.1572031671581935 0.6872929048116855
    9 0.1215185706879032 -0.8272013150697650
    10 0.1215185706879032 0.8272013150697650
    11 0.0801580871597602 -0.9284348836635735
    12 0.0801580871597602 0.9284348836635735
    13 0.0351194603317519 -0.9862838086968123
    14 0.0351194603317519 0.9862838086968123

    n = 15

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.2025782419255613 0.0000000000000000
    2 0.1984314853271116 -0.2011940939974345
    3 0.1984314853271116 0.2011940939974345
    4 0.1861610000155622 -0.3941513470775634
    5 0.1861610000155622 0.3941513470775634
    6 0.1662692058169939 -0.5709721726085388
    7 0.1662692058169939 0.5709721726085388
    8 0.1395706779261543 -0.7244177313601701
    9 0.1395706779261543 0.7244177313601701
    10 0.1071592204671719 -0.8482065834104272
    11 0.1071592204671719 0.8482065834104272
    12 0.0703660474881081 -0.9372733924007060
    13 0.0703660474881081 0.9372733924007060
    14 0.0307532419961173 -0.9879925180204854
    15 0.0307532419961173 0.9879925180204854

    n = 16

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1894506104550685 -0.0950125098376374
    2 0.1894506104550685 0.0950125098376374
    3 0.1826034150449236 -0.2816035507792589
    4 0.1826034150449236 0.2816035507792589
    5 0.1691565193950025 -0.4580167776572274
    6 0.1691565193950025 0.4580167776572274
    7 0.1495959888165767 -0.6178762444026438
    8 0.1495959888165767 0.6178762444026438
    9 0.1246289712555339 -0.7554044083550030
    10 0.1246289712555339 0.7554044083550030
    11 0.0951585116824928 -0.8656312023878318
    12 0.0951585116824928 0.8656312023878318
    13 0.0622535239386479 -0.9445750230732326
    14 0.0622535239386479 0.9445750230732326
    15 0.0271524594117541 -0.9894009349916499
    16 0.0271524594117541 0.9894009349916499

    n = 17

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1794464703562065 0.0000000000000000
    2 0.1765627053669926 -0.1784841814958479
    3 0.1765627053669926 0.1784841814958479
    4 0.1680041021564500 -0.3512317634538763
    5 0.1680041021564500 0.3512317634538763
    6 0.1540457610768103 -0.5126905370864769
    7 0.1540457610768103 0.5126905370864769
    8 0.1351363684685255 -0.6576711592166907
    9 0.1351363684685255 0.6576711592166907
    10 0.1118838471934040 -0.7815140038968014
    11 0.1118838471934040 0.7815140038968014
    12 0.0850361483171792 -0.8802391537269859
    13 0.0850361483171792 0.8802391537269859
    14 0.0554595293739872 -0.9506755217687678
    15 0.0554595293739872 0.9506755217687678
    16 0.0241483028685479 -0.9905754753144174
    17 0.0241483028685479 0.9905754753144174

    n = 18

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1691423829631436 -0.0847750130417353
    2 0.1691423829631436 0.0847750130417353
    3 0.1642764837458327 -0.2518862256915055
    4 0.1642764837458327 0.2518862256915055
    5 0.1546846751262652 -0.4117511614628426
    6 0.1546846751262652 0.4117511614628426
    7 0.1406429146706507 -0.5597708310739475
    8 0.1406429146706507 0.5597708310739475
    9 0.1225552067114785 -0.6916870430603532
    10 0.1225552067114785 0.6916870430603532
    11 0.1009420441062872 -0.8037049589725231
    12 0.1009420441062872 0.8037049589725231
    13 0.0764257302548891 -0.8926024664975557
    14 0.0764257302548891 0.8926024664975557
    15 0.0497145488949698 -0.9558239495713977
    16 0.0497145488949698 0.9558239495713977
    17 0.0216160135264833 -0.9915651684209309
    18 0.0216160135264833 0.9915651684209309

    n = 19

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1610544498487837 0.0000000000000000
    2 0.1589688433939543 -0.1603586456402254
    3 0.1589688433939543 0.1603586456402254
    4 0.1527660420658597 -0.3165640999636298
    5 0.1527660420658597 0.3165640999636298
    6 0.1426067021736066 -0.4645707413759609
    7 0.1426067021736066 0.4645707413759609
    8 0.1287539625393362 -0.6005453046616810
    9 0.1287539625393362 0.6005453046616810
    10 0.1115666455473340 -0.7209661773352294
    11 0.1115666455473340 0.7209661773352294
    12 0.0914900216224500 -0.8227146565371428
    13 0.0914900216224500 0.8227146565371428
    14 0.0690445427376412 -0.9031559036148179
    15 0.0690445427376412 0.9031559036148179
    16 0.0448142267656996 -0.9602081521348300
    17 0.0448142267656996 0.9602081521348300
    18 0.0194617882297265 -0.9924068438435844
    19 0.0194617882297265 0.9924068438435844

    n = 20

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1527533871307258 -0.0765265211334973
    2 0.1527533871307258 0.0765265211334973
    3 0.1491729864726037 -0.2277858511416451
    4 0.1491729864726037 0.2277858511416451
    5 0.1420961093183820 -0.3737060887154195
    6 0.1420961093183820 0.3737060887154195
    7 0.1316886384491766 -0.5108670019508271
    8 0.1316886384491766 0.5108670019508271
    9 0.1181945319615184 -0.6360536807265150
    10 0.1181945319615184 0.6360536807265150
    11 0.1019301198172404 -0.7463319064601508
    12 0.1019301198172404 0.7463319064601508
    13 0.0832767415767048 -0.8391169718222188
    14 0.0832767415767048 0.8391169718222188
    15 0.0626720483341091 -0.9122344282513259
    16 0.0626720483341091 0.9122344282513259
    17 0.0406014298003869 -0.9639719272779138
    18 0.0406014298003869 0.9639719272779138
    19 0.0176140071391521 -0.9931285991850949
    20 0.0176140071391521 0.9931285991850949

    n = 21

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1460811336496904 0.0000000000000000
    2 0.1445244039899700 -0.1455618541608951
    3 0.1445244039899700 0.1455618541608951
    4 0.1398873947910731 -0.2880213168024011
    5 0.1398873947910731 0.2880213168024011
    6 0.1322689386333375 -0.4243421202074388
    7 0.1322689386333375 0.4243421202074388
    8 0.1218314160537285 -0.5516188358872198
    9 0.1218314160537285 0.5516188358872198
    10 0.1087972991671484 -0.6671388041974123
    11 0.1087972991671484 0.6671388041974123
    12 0.0934444234560339 -0.7684399634756779
    13 0.0934444234560339 0.7684399634756779
    14 0.0761001136283793 -0.8533633645833173
    15 0.0761001136283793 0.8533633645833173
    16 0.0571344254268572 -0.9200993341504008
    17 0.0571344254268572 0.9200993341504008
    18 0.0369537897708525 -0.9672268385663063
    19 0.0369537897708525 0.9672268385663063
    20 0.0160172282577743 -0.9937521706203895
    21 0.0160172282577743 0.9937521706203895

    n = 22

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1392518728556320 -0.0697392733197222
    2 0.1392518728556320 0.0697392733197222
    3 0.1365414983460152 -0.2078604266882213
    4 0.1365414983460152 0.2078604266882213
    5 0.1311735047870624 -0.3419358208920842
    6 0.1311735047870624 0.3419358208920842
    7 0.1232523768105124 -0.4693558379867570
    8 0.1232523768105124 0.4693558379867570
    9 0.1129322960805392 -0.5876404035069116
    10 0.1129322960805392 0.5876404035069116
    11 0.1004141444428810 -0.6944872631866827
    12 0.1004141444428810 0.6944872631866827
    13 0.0859416062170677 -0.7878168059792081
    14 0.0859416062170677 0.7878168059792081
    15 0.0697964684245205 -0.8658125777203002
    16 0.0697964684245205 0.8658125777203002
    17 0.0522933351526833 -0.9269567721871740
    18 0.0522933351526833 0.9269567721871740
    19 0.0337749015848142 -0.9700604978354287
    20 0.0337749015848142 0.9700604978354287
    21 0.0146279952982722 -0.9942945854823992
    22 0.0146279952982722 0.9942945854823992

    n = 23

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1336545721861062 0.0000000000000000
    2 0.1324620394046966 -0.1332568242984661
    3 0.1324620394046966 0.1332568242984661
    4 0.1289057221880822 -0.2641356809703450
    5 0.1289057221880822 0.2641356809703450
    6 0.1230490843067295 -0.3903010380302908
    7 0.1230490843067295 0.3903010380302908
    8 0.1149966402224114 -0.5095014778460075
    9 0.1149966402224114 0.5095014778460075
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    15 0.0792814117767189 0.8048884016188399
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    17 0.0642324214085258 0.8767523582704416
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    19 0.0480376717310847 0.9329710868260161
    20 0.0309880058569794 -0.9725424712181152
    21 0.0309880058569794 0.9725424712181152
    22 0.0134118594871418 -0.9947693349975522
    23 0.0134118594871418 0.9947693349975522

    n = 24

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1279381953467522 -0.0640568928626056
    2 0.1279381953467522 0.0640568928626056
    3 0.1258374563468283 -0.1911188674736163
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    22 0.0285313886289337 0.9747285559713095
    23 0.0123412297999872 -0.9951872199970213
    24 0.0123412297999872 0.9951872199970213

    n = 25

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1231760537267154 0.0000000000000000
    2 0.1222424429903100 -0.1228646926107104
    3 0.1222424429903100 0.1228646926107104
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    22 0.0263549866150321 -0.9766639214595175
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    24 0.0113937985010263 -0.9955569697904981
    25 0.0113937985010263 0.9955569697904981

    n = 26

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1183214152792623 -0.0592300934293132
    2 0.1183214152792623 0.0592300934293132
    3 0.1166604434852966 -0.1768588203568902
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    17 0.0632740463295748 -0.8454459427884981
    18 0.0632740463295748 0.8454459427884981
    19 0.0509758252971478 -0.9026378619843071
    20 0.0509758252971478 0.9026378619843071
    21 0.0379623832943628 -0.9471590666617142
    22 0.0379623832943628 0.9471590666617142
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    24 0.0244178510926319 0.9783854459564710
    25 0.0105513726173430 -0.9958857011456169
    26 0.0105513726173430 0.9958857011456169

    n = 27

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1142208673789570 0.0000000000000000
    2 0.1134763461089651 -0.1139725856095300
    3 0.1134763461089651 0.1139725856095300
    4 0.1112524883568452 -0.2264593654395368
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    20 0.0474494125206151 -0.9094823206774911
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    23 0.0352970537574197 0.9509005578147051
    24 0.0226862315961806 -0.9799234759615012
    25 0.0226862315961806 0.9799234759615012
    26 0.0097989960512944 -0.9961792628889886
    27 0.0097989960512944 0.9961792628889886

    n = 28

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1100470130164752 -0.0550792898840343
    2 0.1100470130164752 0.0550792898840343
    3 0.1087111922582941 -0.1645692821333808
    4 0.1087111922582941 0.1645692821333808
    5 0.1060557659228464 -0.2720616276351781
    6 0.1060557659228464 0.2720616276351781
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    10 0.0969306579979299 0.4758742249551183
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    15 0.0746462142345688 -0.7356108780136318
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    20 0.0551073456757167 0.8658925225743951
    21 0.0442729347590042 -0.9156330263921321
    22 0.0442729347590042 0.9156330263921321
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    24 0.0329014277823044 0.9542592806289382
    25 0.0211321125927713 -0.9813031653708727
    26 0.0211321125927713 0.9813031653708727
    27 0.0091242825930945 -0.9964424975739544
    28 0.0091242825930945 0.9964424975739544

    n = 29

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1064793817183142 0.0000000000000000
    2 0.1058761550973209 -0.1062782301326792
    3 0.1058761550973209 0.1062782301326792
    4 0.1040733100777294 -0.2113522861660011
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    20 0.0515948269024979 -0.8746378049201028
    21 0.0515948269024979 0.8746378049201028
    22 0.0414020625186828 -0.9211802329530587
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    24 0.0307404922020936 -0.9572855957780877
    25 0.0307404922020936 0.9572855957780877
    26 0.0197320850561227 -0.9825455052614132
    27 0.0197320850561227 0.9825455052614132
    28 0.0085169038787464 -0.9966794422605966
    29 0.0085169038787464 0.9966794422605966

    n = 30

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.1028526528935588 -0.0514718425553177
    2 0.1028526528935588 0.0514718425553177
    3 0.1017623897484055 -0.1538699136085835
    4 0.1017623897484055 0.1538699136085835
    5 0.0995934205867953 -0.2546369261678899
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    14 0.0807558952294202 0.6205261829892429
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    16 0.0737559747377052 0.6978504947933158
    17 0.0659742298821805 -0.7677774321048262
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    19 0.0574931562176191 -0.8295657623827684
    20 0.0574931562176191 0.8295657623827684
    21 0.0484026728305941 -0.8825605357920527
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    23 0.0387991925696271 -0.9262000474292743
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    25 0.0287847078833234 -0.9600218649683075
    26 0.0287847078833234 0.9600218649683075
    27 0.0184664683110910 -0.9836681232797472
    28 0.0184664683110910 0.9836681232797472
    29 0.0079681924961666 -0.9968934840746495
    30 0.0079681924961666 0.9968934840746495

    n = 31

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0997205447934265 0.0000000000000000
    2 0.0992250112266723 -0.0995553121523415
    3 0.0992250112266723 0.0995553121523415
    4 0.0977433353863287 -0.1981211993355706
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    14 0.0763903865987766 -0.6427067229242603
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    16 0.0696285832354104 -0.7157767845868532
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    20 0.0541030824249169 -0.8399203201462674
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    24 0.0364322739123855 -0.9307569978966481
    25 0.0364322739123855 0.9307569978966481
    26 0.0270090191849794 -0.9625039250929497
    27 0.0270090191849794 0.9625039250929497
    28 0.0173186207903106 -0.9846859096651525
    29 0.0173186207903106 0.9846859096651525
    30 0.0074708315792488 -0.9970874818194770
    31 0.0074708315792488 0.9970874818194770

    n = 32

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0965400885147278 -0.0483076656877383
    2 0.0965400885147278 0.0483076656877383
    3 0.0956387200792749 -0.1444719615827965
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    31 0.0070186100094701 -0.9972638618494816
    32 0.0070186100094701 0.9972638618494816

    n = 33

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0937684461602100 0.0000000000000000
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    30 0.0153217015129347 -0.9864557262306425
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    32 0.0066062278475874 -0.9974246942464552
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    n = 34

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0909567403302599 -0.0455098219531025
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    33 0.0062291405559087 -0.9975717537908420
    34 0.0062291405559087 0.9975717537908420

    n = 35

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0884867949071043 0.0000000000000000
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    35 0.0058834334204431 0.9977065690996003

    n = 36

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0859832756703948 -0.0430181984737086
    2 0.0859832756703948 0.0430181984737086
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    35 0.0055657196642450 -0.9978304624840858
    36 0.0055657196642450 0.9978304624840858

    n = 37

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0837683609931389 0.0000000000000000
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    31 0.0258860369905589 0.9509723432620948
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    35 0.0122387801003076 0.9891859632143192
    36 0.0052730572794979 -0.9979445824779136
    37 0.0052730572794979 0.9979445824779136

    n = 38

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0815250292803858 -0.0407851479045782
    2 0.0815250292803858 0.0407851479045782
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    34 0.0181565777096132 0.9748463285901535
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    36 0.0116134447164687 0.9897394542663855
    37 0.0050028807496393 -0.9980499305356876
    38 0.0050028807496393 0.9980499305356876

    n = 39

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0795276221394429 0.0000000000000000
    2 0.0792762225683685 -0.0794438046087555
    3 0.0792762225683685 0.0794438046087555
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    33 0.0233693848321782 0.9557752123246522
    34 0.0172562290937249 -0.9760987093334711
    35 0.0172562290937249 0.9760987093334711
    36 0.0110347889391646 -0.9902515368546860
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    38 0.0047529446916351 -0.9981473830664329
    39 0.0047529446916351 0.9981473830664329

    n = 40

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0775059479784248 -0.0387724175060508
    2 0.0775059479784248 0.0387724175060508
    3 0.0770398181642480 -0.1160840706752552
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    29 0.0334601952825478 -0.9020988069688743
    30 0.0334601952825478 0.9020988069688743
    31 0.0279370069800234 -0.9328128082786765
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    33 0.0222458491941670 -0.9579168192137917
    34 0.0222458491941670 0.9579168192137917
    35 0.0164210583819079 -0.9772599499837743
    36 0.0164210583819079 0.9772599499837743
    37 0.0104982845311528 -0.9907262386994570
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    39 0.0045212770985332 -0.9982377097105593
    40 0.0045212770985332 0.9982377097105593

    n = 41

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0756955356472984 0.0000000000000000
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    3 0.0754787470927158 0.0756232589891630
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    31 0.0319182117316993 0.9066859447581012
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    36 0.0156449384078186 -0.9783386735610834
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    40 0.0043061403581649 -0.9983215885747715
    41 0.0043061403581649 0.9983215885747715

    n = 42

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0738642342321729 -0.0369489431653518
    2 0.0738642342321729 0.0369489431653518
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    41 0.0041059986046491 -0.9983996189900625
    42 0.0041059986046491 0.9983996189900625

    n = 43

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0722157516937990 0.0000000000000000
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    n = 44

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
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    44 0.0037454048031128 0.9985402006367742

    n = 45

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    tr>
    i weight - wi abscissa - xi
    1 0.0690418248292320 0.0000000000000000
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    45 0.0035826631552836 0.9986036451819367

    n = 46

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
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    46 0.0034303008681070 0.9986630421338180

    n = 47

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
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    47 0.0032874538425280 0.9987187285842121

    n = 48

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
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    n = 49

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
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    n = 50

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
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    n = 51

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
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    n = 52

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
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    n = 53

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
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    n = 54

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
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    n = 55

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
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    n = 56

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
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    n = 57

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
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    n = 58

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
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    n = 59

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0527980126219904 0.0000000000000000
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    59 0.0020954922845412 0.9991833539092947

    n = 60

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0519078776312206 -0.0259597723012478
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    60 0.0020268119688738 0.9992101232274361

    n = 61

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    tr>
    i weight - wi abscissa - xi
    1 0.0510811194407862 0.0000000000000000
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    n = 62

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0502480003752563 -0.0251292914218206
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    n = 63

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0494723666239310 0.0000000000000000
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    11 0.0479664211379951 0.2448467932459534
    12 0.0473086713122689 -0.2924940585862514
    13 0.0473086713122689 0.2924940585862514
    14 0.0465351492453837 -0.3394255419745844
    15 0.0465351492453837 0.3394255419745844
    16 0.0456477478762926 -0.3855263942122479
    17 0.0456477478762926 0.3855263942122479
    18 0.0446486388259414 -0.4306837987951116
    19 0.0446486388259414 0.4306837987951116
    20 0.0435402670830276 -0.4747872479948044
    21 0.0435402670830276 0.4747872479948044
    22 0.0423253450208158 -0.5177288132900333
    23 0.0423253450208158 0.5177288132900333
    24 0.0410068457596664 -0.5594034094862850
    25 0.0410068457596664 0.5594034094862850
    26 0.0395879958915441 -0.5997090518776252
    27 0.0395879958915441 0.5997090518776252
    28 0.0380722675843496 -0.6385471058213654
    29 0.0380722675843496 0.6385471058213654
    30 0.0364633700854573 -0.6758225281149861
    31 0.0364633700854573 0.6758225281149861
    32 0.0347652406453559 -0.7114440995848458
    33 0.0347652406453559 0.7114440995848458
    34 0.0329820348837793 -0.7453246483178474
    35 0.0329820348837793 0.7453246483178474
    36 0.0311181166222198 -0.7773812629903724
    37 0.0311181166222198 0.7773812629903724
    38 0.0291780472082805 -0.8075354957734567
    39 0.0291780472082805 0.8075354957734567
    40 0.0271665743590979 -0.8357135543195029
    41 0.0271665743590979 0.8357135543195029
    42 0.0250886205533450 -0.8618464823641238
    43 0.0250886205533450 0.8618464823641238
    44 0.0229492710048899 -0.8858703285078534
    45 0.0229492710048899 0.8858703285078534
    46 0.0207537612580391 -0.9077263027785316
    47 0.0207537612580391 0.9077263027785316
    48 0.0185074644601613 -0.9273609206218432
    49 0.0185074644601613 0.9273609206218432
    50 0.0162158784103383 -0.9447261340410098
    51 0.0162158784103383 0.9447261340410098
    52 0.0138846126161156 -0.9597794497589419
    53 0.0138846126161156 0.9597794497589419
    54 0.0115193760768800 -0.9724840346975701
    55 0.0115193760768800 0.9724840346975701
    56 0.0091259686763267 -0.9828088105937273
    57 0.0091259686763267 0.9828088105937273
    58 0.0067102917659601 -0.9907285468921895
    59 0.0067102917659601 0.9907285468921895
    60 0.0042785083468638 -0.9962240127779701
    61 0.0042785083468638 0.9962240127779701
    62 0.0018398745955771 -0.9992829840291237
    63 0.0018398745955771 0.9992829840291237

    n = 64

    jump to n = 2345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364
    i weight - wi abscissa - xi
    1 0.0486909570091397 -0.0243502926634244
    2 0.0486909570091397 0.0243502926634244
    3 0.0485754674415034 -0.0729931217877990
    4 0.0485754674415034 0.0729931217877990
    5 0.0483447622348030 -0.1214628192961206
    6 0.0483447622348030 0.1214628192961206
    7 0.0479993885964583 -0.1696444204239928
    8 0.0479993885964583 0.1696444204239928
    9 0.0475401657148303 -0.2174236437400071
    10 0.0475401657148303 0.2174236437400071
    11 0.0469681828162100 -0.2646871622087674
    12 0.0469681828162100 0.2646871622087674
    13 0.0462847965813144 -0.3113228719902110
    14 0.0462847965813144 0.3113228719902110
    15 0.0454916279274181 -0.3572201583376681
    16 0.0454916279274181 0.3572201583376681
    17 0.0445905581637566 -0.4022701579639916
    18 0.0445905581637566 0.4022701579639916
    19 0.0435837245293235 -0.4463660172534641
    20 0.0435837245293235 0.4463660172534641
    21 0.0424735151236536 -0.4894031457070530
    22 0.0424735151236536 0.4894031457070530
    23 0.0412625632426235 -0.5312794640198946
    24 0.0412625632426235 0.5312794640198946
    25 0.0399537411327203 -0.5718956462026340
    26 0.0399537411327203 0.5718956462026340
    27 0.0385501531786156 -0.6111553551723933
    28 0.0385501531786156 0.6111553551723933
    29 0.0370551285402400 -0.6489654712546573
    30 0.0370551285402400 0.6489654712546573
    31 0.0354722132568824 -0.6852363130542333
    32 0.0354722132568824 0.6852363130542333
    33 0.0338051618371416 -0.7198818501716109
    34 0.0338051618371416 0.7198818501716109
    35 0.0320579283548516 -0.7528199072605319
    36 0.0320579283548516 0.7528199072605319
    37 0.0302346570724025 -0.7839723589433414
    38 0.0302346570724025 0.7839723589433414
    39 0.0283396726142595 -0.8132653151227975
    40 0.0283396726142595 0.8132653151227975
    41 0.0263774697150547 -0.8406292962525803
    42 0.0263774697150547 0.8406292962525803
    43 0.0243527025687109 -0.8659993981540928
    44 0.0243527025687109 0.8659993981540928
    45 0.0222701738083833 -0.8893154459951141
    46 0.0222701738083833 0.8893154459951141
    47 0.0201348231535302 -0.9105221370785028
    48 0.0201348231535302 0.9105221370785028
    49 0.0179517157756973 -0.9295691721319396
    50 0.0179517157756973 0.9295691721319396
    51 0.0157260304760247 -0.9464113748584028
    52 0.0157260304760247 0.9464113748584028
    53 0.0134630478967186 -0.9610087996520538
    54 0.0134630478967186 0.9610087996520538
    55 0.0111681394601311 -0.9733268277899110
    56 0.0111681394601311 0.9733268277899110
    57 0.0088467598263639 -0.9833362538846260
    58 0.0088467598263639 0.9833362538846260
    59 0.0065044579689784 -0.9910133714767443
    60 0.0065044579689784 0.9910133714767443
    61 0.0041470332605625 -0.9963401167719553
    62 0.0041470332605625 0.9963401167719553
    63 0.0017832807216964 -0.9993050417357722
    64 0.0017832807216964 0.9993050417357722
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  • 原文地址:https://www.cnblogs.com/Simulation-Campus/p/9064771.html
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