ICTP ANALYSIS SEMINARS - Wednesday 11 June, starting 14:00 - Carlos Cabrelli and Ursula Molter - VENUE: Leonardo Building - Luigi Stasi Seminar Room

[ICTP Math Section]

_*ICTP ANALYSIS SEMINARS*_

Wednesday 11 June 2025

VENUE: Leonardo Building - Luigi Stasi Seminar Room


*14:00 - 15:00
*


Speaker: *Carlos Cabrelli* (Univ. de Buenos Aires and IMAS-CONICET/UBA, 
Argentina)

Title: *Frames by orbits of bounded operators*

*Abstract:* We will survey known results and present new findings that 
settle the problem of existence and characterization of frames generated 
by orbits of bounded operators on separable Hilbert spaces. This talk 
will provide a comprehensive solution to the question of which operators 
admit such frames, a problem motivated by Dynamical Sampling.

/https://indico.ictp.it/event/11054/


*15:30 - 16:30*


Speaker: *Ursula Molter* (Univ. de Buenos Aires and IMAS-CONICET/UBA, 
Argentina)

Title: *Weaving Frames and Riesz bases*

*Abstract: *This talk is about woven frames in separable Hilbert spaces. 
I will start focusing on the finite-dimensional case. We begin by 
simplifying the problem to bases, for which we obtain a unique 
characterization. We establish a condition that is both necessary and 
sufficient for vector reconstruction, which is applicable to Fourier 
matrices. Furthermore, we show that these characterizations are still 
valid in the infinite dimensional case, for Riesz bases. Finally, we 
obtain several results for weaving Riesz bases of translations.

/https://indico.ictp.it/event/11055//

All interested are welcome to attend.

--------------------------

Koutou Mabilo
ICTP Mathematics Group
Leonardo Da Vinci Building
Strada Costiera no. 11
34151 Trieste, Italy
Tel. no.: +39-040-2240455

For to be free is not merely to cast off one's chains, but to live in a way
that respects and enhances the freedom of others. Nelson Mandela
<https://www.ictp.it/>