activity
20232026
most citedA new optimal estimate for the norm of time-frequency localization operators

5 citations · 5 across the 7 of their papers we have counts for

collaborators

8 papers

math.FA2026

On the existence of extremizers for the sum of eigenvalues of Toeplitz operators

Fabio Nicola, Federico Riccardi, Paolo Tilli

We prove that, among all measurable sets of prescribed Lebesgue measure, there exists a set maximizing the sum of the first eigenvalues () of the…

math-ph2025

An elementary approach to Wehrl-type entropy bounds in quantitative form

Fabio Nicola, Federico Riccardi, Paolo Tilli

We consider the problem of the stability (with sharp exponent) of the Lieb--Solovej inequality for symmetric coherent states, which was obtained only recently by the author…

math-ph2025

The Hudson theorem in LCA groups and infinite quantum spin systems

Fabio Nicola, Federico Riccardi

The celebrated Hudson theorem states that the Gaussian functions in are the only functions whose Wigner distribution is everywhere positive. Motivated by quantum inf…

math.FA2025

The isoperimetric inequality for partial sums of Toeplitz eigenvalues in the Fock space

Fabio Nicola, Federico Riccardi, Paolo Tilli

We prove that, among all subsets having circular symmetry and prescribed measure, the ball is the only maximizer of the sum of the first eigenvalues ($K\g…

math.FA2025

An optimal estimate for the norm of wavelet localization operators

Federico Riccardi

In this paper we prove an optimal estimate for the norm of wavelet localization operators with Cauchy wavelet and weight functions that satisfy two constraints on different Lebesgu…

math-ph2024

The Wehrl-type entropy conjecture for symmetric coherent states: cases of equality and stability

Fabio Nicola, Federico Riccardi, Paolo Tilli

Lieb and Solovej proved that, for the symmetric representations, the corresponding Wehrl-type entropy is minimized by symmetric coherent states. However, the uniqueness of…