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math.DG2018
Some remarks on conformal symmetries and Bartnik's splitting conjecture
Ivan P. Costa e Silva, José Luis Flores, Jónatan Herrera
Inspired by the results in a recent paper by G. Galloway and C. Vega (see arXiv:1712.00785), we investigate a number of geometric consequences of the existence of a timelike confor…
math.DG2018
Stationary-Complete Spacetimes with non-standard splittings and pre-Randers metrics
Jonatan Herrera, Miguel Ángel Javaloyes
Using the relativistic Fermat's principle, we establish a bridge between stationary-complete manifolds which satisfy the observer-manifold condition and pre-Randers metrics, namely…
math.DG2015
On a monodromy theorem for sheaves of local fields and applications
Jonatan Herrera, Miguel Angel Javaloyes, Paolo Piccione
We prove a monodromy theorem for local vector fields belonging to a sheaf satisfying the unique continuation property. In particular, in the case of admissible regular sheaves of l…