241 citations · 3.1k across the 105 of their papers we have counts for
4 papers · 1 filter
Gauge invariance and the detection of gravitational radiation
David Garfinkle
The detection of gravitational radiation raises some subtle issues having to do with the coordinate invariance of general relativity. This paper explains these issues and their res…
The need for dark matter in galaxies
David Garfinkle
Cooperstock and Tieu have proposed a model to account for galactic rotation curves without invoking dark matter. I argue that no model of this type can work.
Numerical simulations of stiff fluid gravitational singularities
Joshua Curtis, David Garfinkle
Numerical simulations of the approach to the singularity in spacetimes with stiff fluid matter are presented here. The spacetimes examined have no symmetries and can be regarded as…
Well-posedness of the scale-invariant tetrad formulation of the vacuum Einstein equations
David Garfinkle, Carsten Gundlach
We show that with a small modification, the formulation of the Einstein equations of Uggla et al, which uses tetrad variables normalised by the expansion, is a mixed symmetric hype…