Mathematics – Classical Analysis and ODEs
Scientific paper
2006-11-06
Mathematics
Classical Analysis and ODEs
26 pages
Scientific paper
Almost exponentially localized polynomial kernels are constructed on the unit ball $B^d$ in $\RR^d$ with weights %functions $W_\mu(x)= (1-|x|^2)^{\mu-1/2}$, $\mu \ge 0$, by smoothing out the coefficients of the corresponding orthogonal projectors. These kernels are utilized to the design of cubature formulae on $B^d$ with respect to $W_\mu(x)$ and to the construction of polynomial tight frames in $L^2(B^d, W_\mu)$ (called needlets) whose elements have nearly exponential localization.
Petrushev Pencho
Xu Yuan
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