ROSA J. L.

We use the distribution formalism to derive the complete set of junction conditions for general local rotationally symmetric (LRS) spacetimes in the 1+1+2 covariant formalism. We start by developing a parametric framework encompassing timelike, spacelike, or null hypersurfaces. We then introduce the distribution formalism in the 1+1+2 framework...

We construct exact solutions representing a Friedmann-Lemaître-Robsertson-Walker (FLRW) universe in a generalized hybrid metric-Palatini theory. By writing the gravitational action in a scalar-tensor representation, the new solutions are obtained by either making an ansatz on the scale factor or on the effective potential. Among other relevant...