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SUMMARY:Marija Dimitrijevic (University of Belgrade)
DTSTART:20201105T190000Z
DTEND:20201105T200000Z
DTSTAMP:20260423T052808Z
UID:SGFM/14
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/SGFM/14/">L-
 infinity Algebras of Gravity and their Braided Deformations</a>\nby Marija
  Dimitrijevic (University of Belgrade) as part of Seminario de Geometría 
 y Física - Matemática UCN-USP\n\n\nAbstract\nIn this talk we will descri
 be the cyclic $L_\\infty$-algebra formulation\nof classical general relati
 vity without matter fields in the\nEinstein-Cartan (EC) formalism. We will
  start with a brief review of\n$L_\\infty$-algebra and then apply this for
 malism to the EC gravity.\nAfter discussing the $L_\\infty$ structure of c
 lassical (undeformed)\ngravity\, we will present the $L_\\infty$ formulati
 on of noncommutative\n(deformed\, braided) gravity. The noncommutativity i
 s introduced via the\nDrinfeld twist and the corresponding symmetries (dif
 feomorphisms and\nlocal Lorentz symmetry) are given in terms of twisted (b
 raided)\nHopf-algebras. For simplicity\, we will discuss only the three an
 d four-dimensional cases. Nevertheless\, the whole construction can be don
 e in\nan arbitrary dimensional case.\n
LOCATION:https://researchseminars.org/talk/SGFM/14/
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