讨论小波级数余项的估计问题,以此为基础,研究了小波级数的部分和fm对f∈L^2(R)的逼近性和逼近速度.当母波函数满足一定条件时,建立了小波级数余项的精确估计,从而得到了相关的逐点收敛定理与一致收敛定理。
The estimation problem of the remainders of wavelet expansions is discussed in this paper. Based on this, the approximation and the approximation rate of the partial sums fm of the wavelet expansions to f∈ L^2 (R) is studied. When mother wavelets satisfy certain conditions, the exact estimations of the remainders of wavelet expansions are constructed, and then some related pointwise convergence theorems and uniform convergence theorems are obtained.