The Maclaurin Expansions
نویسندگان
چکیده
The papers [15], [16], [4], [12], [2], [14], [5], [1], [3], [7], [6], [10], [11], [8], [9], [17], and [13] provide the notation and terminology for this paper. The following proposition is true (1) For every real number x and for every natural number n holds |x| = |x|. Let f be a partial function from R to R, let Z be a subset of R, and let a be a real number. The functor Maclaurin(f, Z, a) yields a sequence of real numbers and is defined by: (Def. 1) Maclaurin(f, Z, a) = Taylor(f, Z, 0, a). The following propositions are true: (2) Let n be a natural number, f be a partial function from R to R, and r be a real number. Suppose 0 < r and f is differentiable n + 1 times on ]−r, r[. Let x be a real number. Suppose x ∈ ]−r, r[. Then there exists a real number s such that 0 < s and s < 1 and f(x) = ( ∑κ α=0(Maclaurin(f, ]−r, r[, x))(α))κ∈N(n) + f (]−r,r[)(n+1)(s·x)·x (n+1)! . (3) Let n be a natural number, f be a partial function from R to R, and x0, r be real numbers. Suppose 0 < r and f is differentiable n + 1 times on ]x0 − r, x0 + r[. Let x be a real number. Suppose x ∈ ]x0 − r, x0 + r[. Then there exists a real number s such that 0 < s and s < 1 and |f(x) − ( ∑κ α=0(Taylor(f, ]x0 − r, x0 + r[, x0, x))(α))κ∈N(n)| = | (]x0−r,x0+r[)(n+1)(x0+s·(x−x0))·(x−x0) (n+1)! |.
منابع مشابه
Euler-Maclaurin expansions for integrals with endpoint singularities: a new perspective
In this note, we provide a new perspective on Euler–Maclaurin expansions of (offset) trapezoidal rule approximations of the finite-range integrals I [f ] = ∫ b a f (x) dx, where f ∈ C∞(a, b) but can have general algebraic-logarithmic singularities at one or both endpoints. These integrals may exist either as ordinary integrals or as Hadamard finite part integrals. We assume that f (x) has asymp...
متن کاملEuler-Maclaurin Expansions for Integrals over Triangles and Squares of Functions Having Algebraic/Logarithmic Singularities along an Edge
We derwe and analyze the properties of Euler-Maclaurin expansions for the differences / ~ / s'(log.~) " /(.~. Qilfj is a combination of one-dimensional generalized trapezoidal rule approximations. 1. ~NlKOL)UC110N In this work we are intcrcstcd in deriving Euler-Maclaurin expansions for the singular double integrals where W(X) = x'(Iog x)'. s >-l.s'=O. 1. (1.3) and f(.~,~l) is as many times dif...
متن کاملEuler-Maclaurin expansions for integrals with arbitrary algebraic endpoint singularities
In this paper, we provide the Euler–Maclaurin expansions for (offset) trapezoidal rule approximations of the divergent finite-range integrals ∫ b a f(x) dx, where f ∈ C ∞(a, b) but can have arbitrary algebraic singularities at one or both endpoints. We assume that f(x) has asymptotic expansions of the general forms f(x) ∼ K (x− a)−1 + ∞ ∑ s=0 cs(x− a)s as x → a+, f(x) ∼ L (b− x)−1 + ∞ ∑ s=0 ds(...
متن کاملEuler–Maclaurin Expansions for Integrals with Arbitrary Algebraic-Logarithmic Endpoint Singularities
In this paper, we provide the Euler–Maclaurin expansions for (offset) trapezoidal rule approximations of the finite-range integrals I [f ] = ∫ b a f (x) dx, where f ∈ C∞(a, b) but can have general algebraic-logarithmic singularities at one or both endpoints. These integrals may exist either as ordinary integrals or as Hadamard finite part integrals. We assume that f (x) has asymptotic expansion...
متن کاملRecent Developments in Asymptotic Expansions From Numerical Analysis and Approximation Theory
In this chapter, we discuss some recently obtained asymptotic expansions related to problems in numerical analysis and approximation theory. • We present a generalization of the Euler–Maclaurin (E–M) expansion for the trapezoidal rule approximation of finite-range integrals R b a f ðxÞdx, when f(x) is allowed to have arbitrary algebraic–logarithmic endpoint singularities. We also discuss effect...
متن کامل