Newton–Cotes
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1: Sidebar 9.SB1: Supernumerary Rainbows
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►Airy invented his function in 1838 precisely to describe this phenomenon more accurately than Young had done in 1800 when pointing out that supernumerary rainbows require the wave theory of light and are impossible to explain with Newton’s picture of light as a stream of independent corpuscles.
The house in the picture is Newton’s birthplace.
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2: 3.5 Quadrature
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►Rules of closed type include the Newton–Cotes formulas such as the trapezoidal rules and Simpson’s rule.
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3: 3.8 Nonlinear Equations
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§3.8(ii) Newton’s Rule
… ► … ►Newton’s rule is given by … ►Newton’s method is given by … ►Newton’s rule can also be used for complex zeros of . …4: 29.20 Methods of Computation
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►A second approach is to solve the continued-fraction equations typified by (29.3.10) by Newton’s rule or other iterative methods; see §3.8.
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►Zeros of Lamé polynomials can be computed by solving the system of equations (29.12.13) by employing Newton’s method; see §3.8(ii).
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5: 8.25 Methods of Computation
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►A numerical inversion procedure is also given for calculating the value of (with 10S accuracy), when and are specified, based on Newton’s rule (§3.8(ii)).
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6: 3.3 Interpolation
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§3.3(iv) Newton’s Interpolation Formula
… ►Newton’s formula has the advantage of allowing easy updating: incorporation of a new point requires only addition of the term with to (3.3.38), plus the computation of this divided difference. … ►For comparison, we use Newton’s interpolation formula (3.3.38) …and compute an approximation to by using Newton’s rule (§3.8(ii)) with starting value . …Then by using in Newton’s interpolation formula, evaluating and recomputing , another application of Newton’s rule with starting value gives the approximation , with 8 correct digits. …7: 9.17 Methods of Computation
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►Zeros of the Airy functions, and their derivatives, can be computed to high precision via Newton’s rule (§3.8(ii)) or Halley’s rule (§3.8(v)), using values supplied by the asymptotic expansions of §9.9(iv) as initial approximations.
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8: Bibliography N
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Scattering theory of waves and particles.
Dover Publications, Inc., Mineola, NY.
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Coulomb Functions for Large Values of the Parameter
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Technical report
Atomic Energy of Canada Limited, Chalk
River, Ontario.
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9: 10.74 Methods of Computation
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►Newton’s rule (§3.8(i)) or Halley’s rule (§3.8(v)) can be used to compute to arbitrarily high accuracy the real or complex zeros of all the functions treated in this chapter.
…Newton’s rule is quadratically convergent and Halley’s rule is cubically convergent.
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