104 citations · 370 across the 20 of their papers we have counts for
20 papers
Spacetimes with continuous linear isotropies II: boosts
M. A. H. MacCallum
Conditions are found which ensure that local boost invariance (LBI), invariance under a linear boost isotropy, implies local boost symmetry (LBS), i.e. the existence of a local gro…
Spacetimes with continuous linear isotropies I: spatial rotations
M. A. H. MacCallum
The weakest known criterion for local rotational symmetry (LRS) in spacetimes of Petrov type D is due to Goode and Wainwright (1986). Here it is shown, using methods related to the…
Cosmological models from a geometric point of view
M. A. H. MacCallum
(There is no original abstract.) These are lecture notes from a 1971 summer school surveying the then known cosmological models in particular the properties of Bianchi cosmologies,…
Martin David Kruskal: a biographical memoir
J. D. Gibbon, S. C. Cowley, N. Joshi +1
Martin David Kruskal was one of the most versatile theoretical physicists of his generation and is distinguished for his enduring work in several different areas, most notably plas…
Spacetime invariants and their uses
Malcolm A. H. MacCallum
There are various types of global and local spacetime invariant in general relativity. Here I focus on the local invariants obtainable from the curvature tensor and its derivatives…
Milestones of general relativity: Hubble's law (1929) and the expansion of the universe
M. A. H. MacCallum
Hubble's announcement of the magnitude-redshift relation \cite{Hub29} brought about a major change in our understanding of the Universe. After tracing the pre-history of Hubble's w…