par Barnich, Glenn 
;Troessaert, Cédric
Référence Annals of the University of Craiova, Physics, 21, 1 SPEC. ISSUE, page (11-17)
Publication Publié, 2011
;Troessaert, Cédric Référence Annals of the University of Craiova, Physics, 21, 1 SPEC. ISSUE, page (11-17)
Publication Publié, 2011
Article révisé par les pairs
| Résumé : | We review recent results on symmetries of asymptotically flat spacetimes at null infinity. In higher dimensions, the symmetry algebra realizes the Poincaré algebra. In three and four dimensions, besides the infinitesimal supertranslations that have been known since the sixties, the algebras are evenly balanced because there are also infinitesimal superrotations. We provide the classification of central extensions of bms 3 and bms 4. Applications and consequences as well as directions for future work are briefly indicated. |
