Unconditionality of orthogonal spline systems in H¹
We give a simple geometric characterization of knot sequences for which the corresponding orthonormal spline system of arbitrary order k is an unconditional basis in the atomic Hardy space H¹[0,1].
Unconditionality of orthogonal spline systems in
We prove that given any natural number k and any dense point sequence (tₙ), the corresponding orthonormal spline system is an unconditional basis in reflexive .
Uniform Approximation by Spherical Spline Interpolation.
Uniform convergence results for certain two-dimensional Cauchy principal value integrals.
Unitary Mappings Between Multiresolution Analyses of L... (R) and a Parametrization of Low-Pass Filters.
Univariate spline quasi-interpolants and applications to numerical analysis.
Universal approximation by hill functions
Universally optimal approximation of functionals
A universal optimal in order approximation of a general functional in the space of continuous periodic functions is constructed and its fundamental properties and some generalizations are investigated. As an application the approximation of singular integrals is considered and illustrated by numerical results.