supported by National Natural Science Foundation of China(11071019);Beijing Natural Science Foundation(1132001)
We consider Jackson inequality in L^2 (B^d×T, Wκ,μ^B (x)), where the weight function Wκ,μ^B (X) is defined on the ball B^d and related to reflection group, and obtain the sharp Jackson inequalityEn-1,m-1(f...
Supported by National Natural Science Foundation of China(Grant No.11071019);the research Fund for the Doctoral Program of Higher Education and Beijing Natural Science Foundation(Grant No.1102011)
In this paper, we study the sharp Jackson inequality for the best approximation of f ∈L2,k(Rd) by a subspace Ek2(σ) (SEk2(σ)), which is a subspace of entire functions of exponential type (spherical exponen...
supported partly by National Natural Science Foundation of China(GrantNo.11071019);Research Fund for the Doctoral Program of Higher Education and Beijing Natural Science Foundation(Grant No.1102011)
In this paper,we consider the best EFET(entire functions of the exponential type) approximations of some convolution classes associated with Laplace operator on R d and obtain exact constants in the spaces L1(R2) and ...