Ford
发表于 2025-3-21 17:28:17
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地名表
发表于 2025-3-21 20:50:33
Function Spaces on ,We begin with the univariate case in order to illustrate the action of the differential operator on periodic functions. For a trigonometric polynomial . we have
Absenteeism
发表于 2025-3-22 03:08:59
Linear Approximation,By linear approximation we understand approximation from a fixed finite-dimensional subspace. In the study of approximation of the univariate periodic functions the idea of representing a function by its Fourier series is very natural and traditional.
locus-ceruleus
发表于 2025-3-22 08:28:48
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ARENA
发表于 2025-3-22 10:38:19
Entropy Numbers,The concept of entropy is also known as Kolmogorov entropy and metric entropy. This concept allows us to measure how big is a compact set.
率直
发表于 2025-3-22 15:44:36
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抗原
发表于 2025-3-22 19:24:33
Numerical Integration,A cubature rule Λm(f, ξ) approximates the integral I(f) =f. f(x) dx by computing a weighted sum of finitely many function values at X. = {x., . . . , x.},
CHURL
发表于 2025-3-22 23:18:44
Related Problems,In this section we briefly discuss the development of the hyperbolic cross approximation theory with emphasis put on the development of methods and connections to other areas of research.
加花粗鄙人
发表于 2025-3-23 05:04:01
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delegate
发表于 2025-3-23 08:20:24
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