Seminar in EDP and Applied Mathematics

september 20, 2023 – 14h (Brazil)

Streaming: Youtube Channel | SEMINARIO DE EDP E MATEMATICA APLICADA

Event

About Seminars

Our Online Seminar is one of the most important events in Brazil, it has been held since August 2020, every Wednesday at 2 pm, Brasília time, with a frequency of 14 days. Two 40-minute lectures are presented in each session. Our speakers are world-renowned mathematicians from Europe, the United States and South America.

Featured Talks & Speakers

Adrian Constantin

Faculty of Mathematics, University of Vienna, Austria

14:00h – 14:40h

Existence and stability results for stratospheric planetary flows

We will discuss stratospheric planetary flows in the
atmosphere of the outer planets of our solar system, modelled by
stationary solutions of Euler’s equation on a rotating sphere.
We present some rigidity results, ensuring that the solutions are
either zonal or rotated zonal solutions, and discuss the stability
of Rossby–Haurwitz waves.

Cristina Pignotti

Dipartimento di Matematica Pura e Applicata, Universitá di L’Aquila,Italy

14:50h – 15:30h

Decay estimates for semilinear wave equations with time-dependent time delay

We analyze a class of semilinear damped wave-type equations with a delay feedback with time-variable time delay. Under suitable assumptions on the system’s parameters, by combining semigroup arguments, careful energy estimates, and an iterative approach, we are able to prove a well-posedness result and an exponential decay estimate for solutions corresponding to small initial data. An extension to viscoelastic wave equations with time delay is also discussed.

About Organization

Juan Limaco – UFF – Brazil (Coordenador);
Mauro Rincon – UFRJ – Brazil
Max Souza – UFF – Brazil;
Sandra Malta – LNCC – Brazil
Marcelo Cavalcanti – UEM – Brazil;
Rui Almeida – UBI – Portugal
Roxana Lopez – UNMSM – Peru;
Diego Souza – U Sevilla – España;
Mauricio Sepulveda – UdeC – Chile;
Roberto Capistrano – UFPE – Brazil.