EVENTI
Venerdì 4 novembre 2022 alle ore 15:30 nell’aula Anni (F8) del Dipartimento di Matematica e Fisica “Ennio De Giorgi”, il Prof. Khalid Saifullah (Quaid-i-Azam University, Islamabad, Pakistan), terrà un seminario dal titolo
Symmetries in General Relativity
Abstract: Motions and collineations of a tensor are the vectors along which the tensor remains invariant under the Lie transport relative to that vector. Symmetries of the metric are Killing vectors, and those of the Ricci and energy-momentum tensors are called collinations. Mathematically the Ricci and energy-momentum tensors are very similar and have a kind of 'duality' in their role by virtue of the Einstein field equations. We investigate the relationship between different symmetries of tensors used in Riemannian geometry, and discuss some open problems.
Ref. prof. Francesco De Paolis