[CvGmt News] avviso seminario di Matematica prof. Alessandro Carlotto (13.02.2015)
Valeria Giuliani
valeria.giuliani at sns.it
Wed Jan 28 11:35:38 CET 2015
SEMINARIO DI MATEMATICA
Venerdì 13 febbraio 2015
ore 14:30
*Scuola Normale Superiore*
Pisa
Aula Bianchi
*Alessandro Carlotto*
*Imperial College, London*
Terrà un seminario dal titolo:
*“ Localizing solutions of the Einstein constraint equations ”*
*Abstract:*
*A well-known corollary of the positive mass theorem by Schoen-Yau is that
if an asymptotically flat manifold (of non-negative scalar curvature) is
exactly flat outside of a compact set, then it has to be globally flat: in
other terms any such metric can never be localized inside a compact set. So
what is the "optimal" localization of those metrics? For instance, can one
produce scalar non-negative metrics that have positive ADM mass and still
are trivial in a half-space? *
*In recent joint work with Schoen, we answer these questions by giving a
systematic method for constructing solutions to the Einstein constraint
equations that are localized inside a cone of arbitrarily small aperture.
This sharply contrasts with various recent scalar curvature rigidity
phenomena both in the closed and in the free-boundary setting. Moreover,
the gluing scheme that we adopt allows to produce a new class of exotic
N-body solutions for the Einstein equation, which patently exhibit the
phenomenon of gravitational shielding: for any large T we can engineer
solutions where any two massive bodies do not interact at all for any time
t\in(0,T), in striking contrast with the Newtonian gravity scenario.*
Tutti gli interessati sono invitati a partecipare.
Classe di Scienze Matematiche e Naturali
Valeria Giuliani
Scuola Normale Superiore
Servizio alla Didattica e Allievi
tel. 050 509260
Piazza dei Cavalieri, 7
56126 Pisa
E-mail: valeria.giuliani at sns.it
E-mail: classi at sns.it
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