3 papers
math.FA2021
Estimates for entropy numbers of multiplier operators of multiple series
Sergio Andrés Córdoba Pareja, Jéssica Milaré, Sergio A. Tozoni
The asymptotic behavior for entropy numbers of general Fourier multiplier operators of multiple series with respect to an abstract complete orthonormal system $\{ϕ_{\textbf{m}}\}_{…
math.FA2019
Estimates for -widths of sets of smooth functions on complex spheres
Deimer Julio Aleans, Sergio Antonio Tozoni
In this work we investigate -widths of multiplier operators and , defined for functions on the complex sphere of , associated with sequences of mult…
math.FA2018
Optimal Approximation by -Splines on the Torus
Juliana Gaiba Oliveira, Sergio Antonio Tozoni
Fixed a continuous kernel K on the -dimensional torus, we consider a generalization of the univariate -spline to the torus, associated with the kernel K. It is proved an est…