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Title: Adams–Moulton coefficients Definition: For $s\geq0$, the Adams–Moulton coefficients $\beta^*_{s,j}$ are the rational- coefficients in the implicit $s$-step formula $y_{n+s}=y_{n+s-1}+h\sum_{j=0}^{s}\beta^*_{s,j}f_{n+j}$- CITE{Wiki}. The method has order $s+1$, and an absent row has coefficient $0$.+ numbers for which the implicit $s$-step formula $y_{n+s}=y_{n+s-1}+h\sum_{j=0}^{s}\beta^*_{s,j}f_{n+j}$+ is exact whenever $f(t,y(t))$ is a polynomial in $t$ of degree at most $s$ CITE{Wiki}. Parameters: s:
j: type: Z- title: history index, counted from the oldest value+ title: index of the node, counted from the oldest value display: $j$ constraints: $0\leq j\leq s$
comment-notation: Here $f_{n+j}=f(t_{n+j},y_{n+j})$ and $t_{n+j}=t_0+(n+j)h$. The case $s=0$ is backward Euler, and the case $s=1$ is the trapezoidal rule. The- coefficients are chosen so the formula is exact when $f(t,y(t))$ is a polynomial- in $t$ of degree at most $s$; this is the moment condition in the Formulas section.- comment-step: The step size appears as the single factor $h$ before the sum. Each- stored number is the coefficient multiplying one $f_{n+j}$ when $h=1$.+ method has order $s+1$.+ comment-step: The step size appears as the single factor $h$ before the sum. The+ coefficient of $f_{n+j}$ in the formula is $h\beta^*_{s,j}$. comment-ordering: Entries are listed from the oldest value to the newest value. Wikipedia CITE{Wiki} writes the displayed formulas from newest to oldest; for
as $1/24,-5/24,19/24,3/8$. Formulas:- formula-integral: If $\ell_{s,j}$ is the Lagrange basis polynomial for the nodes- $0,1,\ldots,s$, with $\ell_{s,j}(i)=1$ for $i=j$ and $0$ otherwise, then $\beta^*_{s,j}=\int_{s-1}^{s}\ell_{s,j}(x)\,\mathrm{d}x$.+ formula-integral: If $\ell_{s,j}$ is HREF{Lagrange_basis_polynomials_for_equally_spaced_nodes}[the+ Lagrange basis polynomial] for the nodes $0,1,\ldots,s$, with $\ell_{s,j}(i)=1$+ for $i=j$ and $0$ otherwise, then $\beta^*_{s,j}=\int_{s-1}^{s}\ell_{s,j}(x)\,\mathrm{d}x$. formula-moments: $\sum_{j=0}^{s}\beta^*_{s,j}j^m=(s^{m+1}-(s-1)^{m+1})/(m+1)$ for $0\leq m\leq s$.- formula-gregory: If $\gamma^*_m$ denotes the Gregory coefficient, then $\gamma^*_m=(-1)^m\psi_m(0)/m!$,- where $\psi_m$ is HREF{Bernoulli_polynomials_of_the_second_kind}[the Bernoulli- polynomial of the second kind], and $\beta^*_{s,0}=(-1)^s\gamma^*_s$.+ formula-gregory: $\beta^*_{s,0}=G_s=\psi_s(0)/s!$, where $G_s$ is the Gregory coefficient+ CITE{OEISGregory} and $\psi_s$ is HREF{Bernoulli_polynomials_of_the_second_kind}[the+ Bernoulli polynomial of the second kind]. Similar tables: - table: HREF{Adams_Bashforth_coefficients}[Adams–Bashforth coefficients]
- table: HREF{Bernoulli_polynomials_of_the_second_kind}[Bernoulli polynomials of the second kind]- relation: their value at $0$ gives the oldest Adams–Moulton coefficient through- the Gregory coefficients+ relation: 'their value at $0$ gives the oldest Adams–Moulton coefficient: $\beta^*_{s,0}=\psi_s(0)/s!$' - table: HREF{Butcher_tableaux_of_explicit_Runge_Kutta_methods}[Butcher tableaux of explicit Runge–Kutta methods]
rigour: exact complete: 'no'- complete-note: it holds every nonzero coefficient with $0\leq s\leq12$+ complete-note: it holds every coefficient with $0\leq s\leq12$, matching HREF{Adams_Bashforth_coefficients}[the+ Adams–Bashforth coefficient table] so each predictor there has its Adams–Moulton+ corrector rigour details: The generator builds the moment equations over $\mathbb{Q}$ for the nodes $0,1,\ldots,s$ and solves them exactly. Each completed method is checked
\ rhs))))\n\nadams_moulton_coefficients(3)" Numbers:-- params:- s: '0'- j: '0'- number: '1'- comment: 'Backward Euler method: $1$.'-- params:- s: '1'- j: '0'- number: 1/2- comment: 'Trapezoidal rule, from newest to oldest: $\tfrac{1}{2}(1,1)$.'-- params:- s: '1'- j: '1'- number: 1/2-- params:- s: '2'- j: '0'- number: -1/12- comment: '2-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{12}(5,8,-1)$.'-- params:- s: '2'- j: '1'- number: 2/3-- params:- s: '2'- j: '2'- number: 5/12-- params:- s: '3'- j: '0'- number: 1/24- comment: '3-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{24}(9,19,-5,1)$.'-- params:- s: '3'- j: '1'- number: -5/24-- params:- s: '3'- j: '2'- number: 19/24-- params:- s: '3'- j: '3'- number: 3/8-- params:- s: '4'- j: '0'- number: -19/720- comment: '4-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{720}(251,646,-264,106,-19)$.'-- params:- s: '4'- j: '1'- number: 53/360-- params:- s: '4'- j: '2'- number: -11/30-- params:- s: '4'- j: '3'- number: 323/360-- params:- s: '4'- j: '4'- number: 251/720-- params:- s: '5'- j: '0'- number: 3/160- comment: '5-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{1440}(475,1427,-798,482,-173,27)$.'-- params:- s: '5'- j: '1'- number: -173/1440-- params:- s: '5'- j: '2'- number: 241/720-- params:- s: '5'- j: '3'- number: -133/240-- params:- s: '5'- j: '4'- number: 1427/1440-- params:- s: '5'- j: '5'- number: 95/288-- params:- s: '6'- j: '0'- number: -863/60480- comment: '6-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{60480}(19087,65112,-46461,37504,-20211,6312,-863)$.'-- params:- s: '6'- j: '1'- number: 263/2520-- params:- s: '6'- j: '2'- number: -6737/20160-- params:- s: '6'- j: '3'- number: 586/945-- params:- s: '6'- j: '4'- number: -15487/20160-- params:- s: '6'- j: '5'- number: 2713/2520-- params:- s: '6'- j: '6'- number: 19087/60480-- params:- s: '7'- j: '0'- number: 275/24192- comment: '7-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{120960}(36799,139849,-121797,123133,-88547,41499,-11351,1375)$.'-- params:- s: '7'- j: '1'- number: -11351/120960-- params:- s: '7'- j: '2'- number: 1537/4480-- params:- s: '7'- j: '3'- number: -88547/120960-- params:- s: '7'- j: '4'- number: 123133/120960-- params:- s: '7'- j: '5'- number: -4511/4480-- params:- s: '7'- j: '6'- number: 139849/120960-- params:- s: '7'- j: '7'- number: 5257/17280-- params:- s: '8'- j: '0'- number: -33953/3628800- comment: '8-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{3628800}(1070017,4467094,-4604594,5595358,-5033120,3146338,-1291214,312874,-33953)$.'-- params:- s: '8'- j: '1'- number: 156437/1814400-- params:- s: '8'- j: '2'- number: -645607/1814400-- params:- s: '8'- j: '3'- number: 1573169/1814400-- params:- s: '8'- j: '4'- number: -31457/22680-- params:- s: '8'- j: '5'- number: 2797679/1814400-- params:- s: '8'- j: '6'- number: -2302297/1814400-- params:- s: '8'- j: '7'- number: 2233547/1814400-- params:- s: '8'- j: '8'- number: 1070017/3628800-- params:- s: '9'- j: '0'- number: 8183/1036800- comment: '9-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{7257600}(2082753,9449717,-11271304,16002320,-17283646,13510082,-7394032,2687864,-583435,57281)$.'-- params:- s: '9'- j: '1'- number: -116687/1451520-- params:- s: '9'- j: '2'- number: 335983/907200-- params:- s: '9'- j: '3'- number: -462127/453600-- params:- s: '9'- j: '4'- number: 6755041/3628800-- params:- s: '9'- j: '5'- number: -8641823/3628800-- params:- s: '9'- j: '6'- number: 200029/90720-- params:- s: '9'- j: '7'- number: -1408913/907200-- params:- s: '9'- j: '8'- number: 9449717/7257600-- params:- s: '9'- j: '9'- number: 25713/89600-- params:- s: '10'- j: '0'- number: -3250433/479001600- comment: '10-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{479001600}(134211265,656185652,-890175549,1446205080,-1823311566,1710774528,-1170597042,567450984,-184776195,36284876,-3250433)$.'-- params:- s: '10'- j: '1'- number: 9071219/119750400-- params:- s: '10'- j: '2'- number: -12318413/31933440-- params:- s: '10'- j: '3'- number: 23643791/19958400-- params:- s: '10'- j: '4'- number: -21677723/8870400-- params:- s: '10'- j: '5'- number: 2227571/623700-- params:- s: '10'- j: '6'- number: -33765029/8870400-- params:- s: '10'- j: '7'- number: 12051709/3991680-- params:- s: '10'- j: '8'- number: -296725183/159667200-- params:- s: '10'- j: '9'- number: 164046413/119750400-- params:- s: '10'- j: '10'- number: 26842253/95800320-- params:- s: '11'- j: '0'- number: 4671/788480- comment: '11-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{958003200}(262747265,1374799219,-2092490673,3828828885,-5519460582,6043521486,-4963166514,3007739418,-1305971115,384709327,-68928781,5675265)$.'-- params:- s: '11'- j: '1'- number: -68928781/958003200-- params:- s: '11'- j: '2'- number: 384709327/958003200-- params:- s: '11'- j: '3'- number: -87064741/63866880-- params:- s: '11'- j: '4'- number: 501289903/159667200-- params:- s: '11'- j: '5'- number: -91910491/17740800-- params:- s: '11'- j: '6'- number: 1007253581/159667200-- params:- s: '11'- j: '7'- number: -102212233/17740800-- params:- s: '11'- j: '8'- number: 36465037/9123840-- params:- s: '11'- j: '9'- number: -99642413/45619200-- params:- s: '11'- j: '10'- number: 1374799219/958003200-- params:- s: '11'- j: '11'- number: 4777223/17418240-- params:- s: '12'- j: '0'- number: -13695779093/2615348736000- comment: '12-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{2615348736000}(703604254357,3917551216986,-6616420957428,13465774256510,-21847538039895,27345870698436,-26204344465152,19058185652796,-10344711794985,4063327863170,-1092096992268,179842822566,-13695779093)$.'-- params:- s: '12'- j: '1'- number: 2724891251/39626496000-- params:- s: '12'- j: '2'- number: -30336027563/72648576000-- params:- s: '12'- j: '3'- number: 406332786317/261534873600-- params:- s: '12'- j: '4'- number: -229882484333/58118860800-- params:- s: '12'- j: '5'- number: 529394045911/72648576000-- params:- s: '12'- j: '6'- number: -4874320027/486486000-- params:- s: '12'- j: '7'- number: 84400835489/8072064000-- params:- s: '12'- j: '8'- number: -485500845331/58118860800-- params:- s: '12'- j: '9'- number: 1346577425651/261534873600-- params:- s: '12'- j: '10'- number: -551368413119/217945728000-- params:- s: '12'- j: '11'- number: 6595204069/4402944000-- params:- s: '12'- j: '12'- number: 703604254357/2615348736000+ '0':+ '0':+ number: '1'+ comment: This is the backward Euler method.+ '1':+ '0':+ number: 1/2+ comment: 'Trapezoidal rule, from newest to oldest: $\tfrac{1}{2}(1,1)$.'+ '1': 1/2+ '2':+ '0':+ number: -1/12+ comment: '2-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{12}(5,8,-1)$.'+ '1': 2/3+ '2': 5/12+ '3':+ '0':+ number: 1/24+ comment: '3-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{24}(9,19,-5,1)$.'+ '1': -5/24+ '2': 19/24+ '3': 3/8+ '4':+ '0':+ number: -19/720+ comment: '4-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{720}(251,646,-264,106,-19)$.'+ '1': 53/360+ '2': -11/30+ '3': 323/360+ '4': 251/720+ '5':+ '0':+ number: 3/160+ comment: '5-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{1440}(475,1427,-798,482,-173,27)$.'+ '1': -173/1440+ '2': 241/720+ '3': -133/240+ '4': 1427/1440+ '5': 95/288+ '6':+ '0':+ number: -863/60480+ comment: '6-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{60480}(19087,65112,-46461,37504,-20211,6312,-863)$.'+ '1': 263/2520+ '2': -6737/20160+ '3': 586/945+ '4': -15487/20160+ '5': 2713/2520+ '6': 19087/60480+ '7':+ '0':+ number: 275/24192+ comment: '7-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{120960}(36799,139849,-121797,123133,-88547,41499,-11351,1375)$.'+ '1': -11351/120960+ '2': 1537/4480+ '3': -88547/120960+ '4': 123133/120960+ '5': -4511/4480+ '6': 139849/120960+ '7': 5257/17280+ '8':+ '0':+ number: -33953/3628800+ comment: '8-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{3628800}(1070017,4467094,-4604594,5595358,-5033120,3146338,-1291214,312874,-33953)$.'+ '1': 156437/1814400+ '2': -645607/1814400+ '3': 1573169/1814400+ '4': -31457/22680+ '5': 2797679/1814400+ '6': -2302297/1814400+ '7': 2233547/1814400+ '8': 1070017/3628800+ '9':+ '0':+ number: 8183/1036800+ comment: '9-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{7257600}(2082753,9449717,-11271304,16002320,-17283646,13510082,-7394032,2687864,-583435,57281)$.'+ '1': -116687/1451520+ '2': 335983/907200+ '3': -462127/453600+ '4': 6755041/3628800+ '5': -8641823/3628800+ '6': 200029/90720+ '7': -1408913/907200+ '8': 9449717/7257600+ '9': 25713/89600+ '10':+ '0':+ number: -3250433/479001600+ comment: '10-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{479001600}(134211265,656185652,-890175549,1446205080,-1823311566,1710774528,-1170597042,567450984,-184776195,36284876,-3250433)$.'+ '1': 9071219/119750400+ '2': -12318413/31933440+ '3': 23643791/19958400+ '4': -21677723/8870400+ '5': 2227571/623700+ '6': -33765029/8870400+ '7': 12051709/3991680+ '8': -296725183/159667200+ '9': 164046413/119750400+ '10': 26842253/95800320+ '11':+ '0':+ number: 4671/788480+ comment: '11-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{958003200}(262747265,1374799219,-2092490673,3828828885,-5519460582,6043521486,-4963166514,3007739418,-1305971115,384709327,-68928781,5675265)$.'+ '1': -68928781/958003200+ '2': 384709327/958003200+ '3': -87064741/63866880+ '4': 501289903/159667200+ '5': -91910491/17740800+ '6': 1007253581/159667200+ '7': -102212233/17740800+ '8': 36465037/9123840+ '9': -99642413/45619200+ '10': 1374799219/958003200+ '11': 4777223/17418240+ '12':+ '0':+ number: -13695779093/2615348736000+ comment: '12-step Adams-Moulton formula, from newest to oldest: $\tfrac{1}{2615348736000}(703604254357,3917551216986,-6616420957428,13465774256510,-21847538039895,27345870698436,-26204344465152,19058185652796,-10344711794985,4063327863170,-1092096992268,179842822566,-13695779093)$.'+ '1': 2724891251/39626496000+ '2': -30336027563/72648576000+ '3': 406332786317/261534873600+ '4': -229882484333/58118860800+ '5': 529394045911/72648576000+ '6': -4874320027/486486000+ '7': 84400835489/8072064000+ '8': -485500845331/58118860800+ '9': 1346577425651/261534873600+ '10': -551368413119/217945728000+ '11': 6595204069/4402944000+ '12': 703604254357/2615348736000
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