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Organizers: Paolo Antonelli, Gabriele Benomio, Yuri Cacchiò, Sara Daneri, Luigi De Rosa, Francesco Paolo Maiale, Pierangelo Marcati, Stefano Modena, Jules Pitcho, Flavio Rossetti, Eris Runa
Location & time: Gran Sasso Science Institute, weekly on Tuesdays, 2:30-3:30pm (map)
Upcoming Seminars: (see also GSSI Academic Calendar)
10 February 2026, 2:30-3:30pm, GSSI Main Lecture Hall
Speaker: Luca Talamini (SISSA)
Title: Some results on L^∞ entropy solutions to systems of two conservation laws
Abstract: The pioneering work of Tartar and DiPerna established the existence of entropy solutions to systems of two conservation laws in the L^∞ setting by adapting the compensated compactness method. However, no regularity properties are known for these solutions. As a first step in this direction, we discuss a Liouville-type theorem for isentropic solutions of 2×2 genuinely nonlinear systems, together with some of its applications. The arguments are based on a kinetic formulation and on a Lagrangian representation at the kinetic level. Joint work with F. Ancona and E. Marconi.
17 February 2026, 2:30-3:30pm, GSSI Main Lecture Hall
Speaker: Gemma Hood (Leipzig University)
Title: A scattering construction for nonlinear wave equations on Kerr-Anti de Sitter spacetimes
Abstract: Given the sharp logarithmic decay of linear waves on the Kerr-AdS black hole (Holzegel, Smulevici, 2013), it is expected that the Kerr-AdS spacetime is unstable as a solution of the Einstein vacuum equations. However, the scattering construction presented here for exponentially decaying nonlinear waves on a fixed Kerr-AdS background serves as a first step to confronting the scattering problem for the full Einstein system. In this context, one may hope to derive a class of perturbations of Kerr-AdS which remain ‘close’ and dissipate sufficiently fast.
3 March 2026, 2:30-3:30pm, GSSI Main Lecture Hall
Speaker: Óscar Domínguez (CUNEF University)
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17 March 2026, 2:30-3:30pm, GSSI Main Lecture Hall
Speaker: Ayman Said (CNRS/LMR)
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24 March 2026, 2:30-3:30pm, GSSI Main Lecture Hall
Speaker: Sam Krupa (ENS Paris)
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26 March 2026, 2:30-3:30pm, GSSI Main Lecture Hall
Speaker: Christof Sparber (University of Illinois at Chicago)
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