891 citations · 2.9k across the 74 of their papers we have counts for
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Almost Complex and Almost Product Einstein Manifolds from a Variational Principle
A. Borowiec, M. Ferraris, M. Francaviglia +1
It is shown that the first order (Palatini) variational principle for a generic nonlinear metric-affine Lagrangian depending on the (symmetrized) Ricci square invariant leads to an…
Universality of Einstein Equations for the Ricci Squared Lagrangians
A. Borowiec, M. Ferraris, M. Francaviglia +1
It has been recently shown that, in the first order (Palatini) formalism, there is universality of Einstein equations and Komar energy-momentum complex, in the sense that for a gen…
Gauge Formalism for General Relativity and Fermionic Matter
Lorenzo Fatibene, Marco Ferraris, Mauro Francaviglia +1
A new formalism for spinors on curved spaces is developed in the framework of variational calculus on fibre bundles. The theory has the same structure of a gauge theory and describ…
A geometric definition of Lie derivative for Spinor Fields
Lorenzo Fatibene, Marco Ferraris, Mauro Francaviglia +1
Relying on the general theory of Lie derivatives a new geometric definition of Lie derivative for general spinor fields is given, more general than Kosmann's one. It is shown that…