2 papers
math.CA2026
Isotropic Positive Definite Functions on Spheres
Han Feng, Yan Ge
In this paper, we investigate the relationship between positive definite functions on the unit sphere $\sph$ and on the Euclidean space $\RR^d$. For the dimension to be odd, a…
math.CA2025
Best approximation by polynomials on the conic domains
Yan Ge, Yuan Xu
A new modulus of smoothness and its equivalent -function are defined on the conic domains in , and used to characterize the weighted best approximation by polynomi…