JAT
2008
14 years 22 days ago
2008
We first present necessary and sufficient conditions for a linear, binary, uniform, and stationary sub
JAT
2008
14 years 22 days ago
2008
Variable Hilbert scales are an important tool for the recent analysis of inverse problems in Hilbert spaces, as these constitute a way to describe smoothness of objects other than ...
JAT
2008
14 years 22 days ago
2008
JAT
2008
14 years 22 days ago
2008
We obtain optimal trigonometric polynomials of a given degree N that majorize, minorize and approximate in L1(R/Z) the Bernoulli periodic functions. These are the periodic analogue...
JAT
2008
14 years 22 days ago
2008
In this paper we give a simple characterization of weighted Sobolev spaces (with piecewise monotonous weights) such that the multiplication operator is bounded: it is bounded if an...
JAT
2008
14 years 22 days ago
2008
We use a generalization of Wiener's 1/f theorem to prove that for a Gabor frame with the generator in the Wiener amalgam space W (L , 1 )(Rd ), the corresponding frame operato...
JAT
2008
14 years 22 days ago
2008
JAT
2008
14 years 22 days ago
2008
It is well known that if a finite order linear differential operator with polynomial coefficients has as eigenfunctions a sequence of orthogonal polynomials with respect to a posi...