accelerating convergence
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8/20/2019 Accelerating Convergence
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AITKEN'S METHODg(x) = e^-xp0 = 0
n pn (fxed point)0 2.00000001 0.69314722 1.43810243 1.21490204 1.31879555 1.27524386 1.29445247 1.28615508 1.28977259 1.2882016
10 1.288885011 1.288587912 1.288717113 1.288661014 1.288685415 1.288674816 1.288679417 1.288677418 1.288678219 1.288677920 1.288678021 1.288677922 1.288678023 1.2886780
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(Accelerating fxed p int iterati n!)
en lambda (bisection)- -
1.3068528 -0.7449552 0.57003760.2232004 0.29961580.1038934 0.46547170.0435517 0.41919580.0192086 0.44105210.0082973 0.43195900.0036175 0.43598170.0015709 0.43424640.0006833 0.43500340.0002970 0.43467470.0001292 0.43481770.0000562 0.43475560.0000244 0.43478260.0000106 0.43477080.0000046 0.43477600.0000020 0.43477370.0000009 0.43477470.0000004 0.43477430.0000002 0.43477450.0000001 0.43477440.0000000 0.43477440.0000000 0.4347744
2.30039370.4347086
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pn_ba (ait!en's) lambda (ait!en's) pn(fxed point "o ste#ens- - 2.000000000000- - 0.6931472
1.1676296 - 1.43810241.2663591 - 1.33612431.2857962 0.1968732 1.26720001.2881079 0.1189296 1.28931581.2885733 0.2013431 1.28840051.2886580 0.1818593 1.28867811.2886742 0.1917654 1.28867791.2886773 0.1877711 1.28867801.2886778 0.1895625 1.28867801.2886779 0.1887943 1.28867801.2886780 0.1891303 1.28867801.2886780 0.1889846 1.28867801.2886780 0.1890479 1.28867801.2886780 0.1890205 1.28867801.2886780 0.1890320 1.28867801.2886780 0.1890240 1.28867801.2886780 0.1890361 1.28867801.2886780 0.1890042 1.28867801.2886780 0.1897628 1.28867801.2886780 0.1842105 1.28867801.2886780 0.0000000 1.28867801.2886780 "#$%&0' 1.2886780
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pn_ba (ste#enson's)
1.1676296
1.2872092
1.2886777
1.2886780
1.2886780
"#$%&0'
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"#$%&0'
"#$%&0'
"#$%&0'
"#$%&0'
8/20/2019 Accelerating Convergence
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n a ! l te e01 """2 """3 """4 """5 """6 """7 """8 """9 """
10 """11 """12 """13 """14 """15 """16 """17 """18 """19 """20 """21 """22 """23 """24 """25 """
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a!*+pt tic c n!tant n a ! l te e a!*+pt tic c n!tant err r01
0.570038 20.299616 30.465472 4 0.0194370.419196 5 0.002312 0.118930.441052 6 0.000465 0.2013430.431959 7 8.46,-005 0.1818590.435982 8 1.62,-005 0.1917650.434246 9 3.05,-006 0.1877710.435003 10 5.78,-007 0.1895620.434675 11 1.09,-007 0.1887940.434818 12 2.06,-008 0.189130.434756 13 3.90,-009 0.1889850.434783 14 7.37,-010 0.1890480.434771 15 1.39,-010 0.1890210.434776 16 2.63,-011 0.1890320.434774 17 4.98,-012 0.1890240.434775 18 9.41,-013 0.1890360.434774 19 1.78,-013 0.1890040.434774 20 3.38,-014 0.1897630.434774 21 6.22,-015 0.1842110.434774 22 1.33,-015 0.2142860.434774 23 2.22,-016 0.166667
95092775 24 1.288678 5.8, 0150 25 0 0