27 citations · 42 across the 3 of their papers we have counts for
3 papers
gr-qc2013
Different representations of the Levi-Civita Bertotti Robinson solution
Oyvind Gron, Steinar Johannesen
The Levi-Civita Bertotti Robinson (LBR) spacetime is investigated in various coordinate systems. By means of a general formalism for constructing coordinates in conformally flat sp…
gr-qc2007★ 15 cited
Closed timelike geodesics in a gas of cosmic strings
Oyvind Gron, Steinar Johannesen
We find a class of solutions of Einstein's field equations representing spacetime outside a spinning cosmic string surrounded by a gas of non-spinning cosmic strings, and show that…
astro-ph2005★ 27 cited
Can a dust dominated universe have accelerated expansion?
H. Alnes, M. Amarzguioui, O. Gron
Recently, there has been suggestions that the apparent accelerated expansion of the universe is due not to a cosmological constant, but rather to inhomogeneities in the distributio…