A. Azimifard

works on

eigenvalue bounds 1 product boxes 1 schatten norms 1 spectral concentration 1 tensor factorization 1 trace asymptotics 1

From the 1 of 3 linked papers with an AI index.

collaborators

3 papers

math.FA2026

Entropy-type traces and moment expansions for the sine-kernel time-band limiting operator

Ahmadreza Azimifard

We study the sine-kernel time--band limiting operator $S_{c}$ on $L^{2} (0, c)$ through the entropy-type trace $Tr φ_{u} (S_{c})$ , where $φ_{u} (x) = lo g (1 + (e^{u} - 1) x) - ux$ . A Fourier…

math.FA2026

Tensor factorization and explicit spectral bounds for product-box concentration operators

Ahmadreza Azimifard

The paper derives explicit uniform upper bounds on the number of eigenvalues of spatio‑spectral concentration operators that lie away from 0 and 1 when the underlying sets are fini…

math.FA2026

An independent proof of the plunge-region conjecture for time-frequency localization operators in dimension one

Ahmadreza Azimifard

Let $A_{0}, B_{0} \subset R$ be bounded measurable sets of positive measure with finite topological boundaries, and let $S_{c A_{0}, B_{0}} = P_{c A_{0}} Q_{B_{0}} P_{c A_{0}}$ be the associated t…