5 citations · 9 across the 9 of their papers we have counts for
9 papers
A variation on the Pólya-Segő principle in one dimension
Sorina Barza, Martin Lind
We establish a one-dimensional Pólya-Szegő principle for the Riesz -variation , a family of functionals that interpolates between Wiener -variation and t…
Eliminating positive-measure level sets by small Lipschitz perturbations
Sorina Barza, Martin Lind
We establish a new regularity phenomenon of continuous functions. Specifically, given any continuous function and arbitrary , we construct a Lipschitz perturbation w…
Discrete reversed Hardy inequalities and Hölder estimates in Lorentz sequence spaces
Sorina Barza, Anca-Nicoleta Marcoci, Liviu-Gabriel Marcoci
We prove sharp reversed Hardy-type inequalities on the cone of decreasing sequences in weighted -spaces with power weights, applying them to estimate standard norms in Lore…
End-point Norm Estimates for Cesàro and Copson Operators
Sorina Barza, Bizuneh Minda Demissie, Gord Sinnamon
For a large class of operators acting between weighted spaces, exact formulas are given for their norms and the norms of their restrictions to the cones of nonnegativ…
Factorizations of weighted Hardy inequalities
Sorina Barza, Anca N. Marcoci, Liviu G. Marcoci
We present factorizations of weighted Lebesgue, Ce\-s\` aro and Copson spaces, for weights satisfying the conditions which assure the boundedness of the Hardy's integral operator b…
Sharp constants related to the triangle inequality in Lorentz spaces
Sorina Barza, Viktor Kolyada, Javier Soria
We study the Lorentz spaces in the range , for which the standard functional i…