Fourier–Jacobi harmonic analysis and approximation of functions
Fourier–Jacobi harmonic analysis and approximation of functions
复制标题
傅立叶-雅可比调和分析和函数逼近
DOI:
10.1070/im2014v078n01abeh002682
复制
发表时间:
2014
期刊:
影响因子:
--
通讯作者:
S. Platonov
中科院分区:
文献类型:
--
作者:
Сергей Сергеевич Платонов;S. Platonov
We use the methods of Fourier–Jacobi harmonic analysis to study problems of the approximation of functions by algebraic polynomials in weighted function spaces on . We prove analogues of Jackson's direct theorem for the moduli of smoothness of all orders constructed on the basis of Jacobi generalized translations. The moduli of smoothness are shown to be equivalent to -functionals constructed from Sobolev-type spaces. We define Nikol'skii–Besov spaces for the Jacobi generalized translation and describe them in terms of best approximations. We also prove analogues of some inverse theorems of Stechkin.
DOI:
10.1007/b128597
发表时间:
2003
期刊:
--
影响因子:
--
作者:
F. Marcellán;W. Assche
通讯作者:
F. Marcellán;W. Assche