46 citations · 229 across the 16 of their papers we have counts for
7 papers · 1 filter
Accelerating expansion and change of signature
Marc Mars, José M. M. Senovilla, Raül Vera
We show that some types of sudden singularities admit a natural explanation in terms of regular changes of signature on brane-worlds in AdS. The present accelerated expansion…
A New Type of Singularity Theorem
José M. M. Senovilla
A new type of singularity theorem, based on spatial averages of physical quantities, is presented and discussed. Alternatively, the results inform us of when a spacetime can be sin…
Report on workshop A1: Exact solutions and their interpretation
José M. M. Senovilla
I report on the communications and posters presented on exact solutions and their interpretation at the GRG18 Conference, Sydney.
Is the accelerated expansion evidence of a forthcoming change of signature on the brane?
Marc Mars, José M. M. Senovilla, Raül Vera
We show that regular changes of signature on brane-worlds in AdS bulks may account for some types of the recently fashionable sudden singularities. Therefore, the possibility that…
A Reformulation of the Hoop Conjecture
José M M. Senovilla
A reformulation of the Hoop Conjecture based on the concept of trapped circle is presented. The problems of severe compactness in every spatial direction, and of how to superpose t…
Lorentzian and signature changing branes
Marc Mars, José M. M. Senovilla, Raül Vera
General hypersurface layers are considered in order to describe brane-worlds and shell cosmologies. No restriction is placed on the causal character of the hypersurface which may t…