S. Barza

collaborators

3 papers

math.CA2026

A variation on the PÃ³lya-SegÅ principle in one dimension

Sorina Barza, Martin Lind

We prove a PÃ³lya-SzegÅ principle for the Riesz $(p, I^\pm)$ -variation, a scale of fractional smoothness interpolating between bounded $p$ -variation and the Sobolev space $W^{1, p}$ . I…

math.CA2026

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 $f$ and arbitrary $I^µ > 0$ , we construct a Lipschitz perturbation $g_{I^} µ$ …

math.FA2026

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 $ℓ^{p}$ -spaces with power weights, applying them to estimate standard norms in Lore…

A variation on the PÃ³lya-SegÅ principle in one dimension

Eliminating positive-measure level sets by small Lipschitz perturbations

Discrete reversed Hardy inequalities and Hölder estimates in Lorentz sequence spaces

A variation on the PÃ³lya-SegÅ principle in one dimension