165 citations · 1.1k across the 59 of their papers we have counts for
5 papers · 1 filter
Lorentzian manifolds isometrically embeddable in L^N
Olaf Müller, Miguel Sánchez
We characterize those spacetimes which admit a isometric (or conformal) embedding in some Lorentz-Minkowski space L^N. In particular, any globally hyperbolic spacetime can be isome…
Causal boundaries and holography on wave type spacetimes
Miguel Sánchez
The notion of a causal boundary for a spacetime has been a controversial topic during the last three decades. Moreover, recently the role of the boundary in the AdS/CFT corresponde…
A note on the existence of standard splittings for conformally stationary spacetimes
Miguel Angel Javaloyes, Miguel Sánchez
Let be a spacetime which admits a complete timelike conformal Killing vector field . We prove that splits globally as a standard conformastationary spacetime wit…
On the foundations and necessity of classical gauge invariance
Miguel Sánchez
We argue that, ideally, the ways to measure magnitudes in non-quantum theories of physics (spacetime, field theory), limit drastically their possible mathematical models. In partic…
Physics from scratch. Letter on M. Tegmark's ``The Mathematical Universe''
Antonio N. Bernal, Miguel Sánchez, Francisco José Soler Gil
In a recent article, M. Tegmark poses the hypothesis that our known universe is a ``baggage free'' mathematical structure among many other possible ones, which also correspond to o…