16 citations · 37 across the 5 of their papers we have counts for
7 papers
The dynamical behaviour of homogeneous scalar-field spacetimes with general self-interaction potentials
Roberto Giambó, Fabio Giannoni, Giulio Magli
The dynamics of homogeneous Robertson--Walker cosmological models with a self-interacting scalar field source is examined here in full generality, requiring only the scalar field p…
Global visibility of naked singularities
R. Giambo'
Global visibility of naked singularities is analyzed here for a class of spherically symmetric spacetimes, extending previous studies - limited to inhomogeneous dust cloud collapse…
A variational approach to homogeneous scalar fields in General Relativity
R. Giambo', F. Giannoni, G. Magli
A result of existence of homogeneous scalar field solutions between prescribed configurations is given, using a modified version of Euler--Maupertuis least action variational princ…
Dynamics and Thermodynamics of Blackholes and Naked Singularities
Lorenzo Fatibene, Mauro Francaviglia, Roberto Giambo' +1
Proceedings of the international Workshop on ``Dynamics and Thermodynamics of Blackholes and Naked Singularities``, that took place at the Department of Mathematics of the Politecn…
Comment on "Spherically symmetric perfect fluid in area-radial coordinates" by Iguchi et al
Roberto Giambo', Fabio Giannoni, Giulio Magli +1
In this short note we comment about some criticisms - appeared in a recent paper by Iguchi et al - to our previous works on gravitational collapse of perfect fluids. We show that t…
On the Maslov index of symplectic paths that are not transversal to the Maslov cycle. Semi-Riemannian index theorems in the degenerate case
R. Giambo, P. Piccione, A. Portaluri
We use the notion of generalized signatures at a singularity of a smooth curve of symmetric bilinear forms to determine a formula for the computation of the Maslov index in the cas…