2 papers
gr-qc2026
A Scale-Invariant Theory of the Universe
Julian Barbour, Maria I. R. Lourenço
Modern physics has achieved extraordinary empirical success while retaining much of the absolute, unobservable structure introduced by Newton, largely without questioning its neces…
gr-qc2026
Structural morphology and the gravitational arrow of time
Julian Barbour, Francisco S. N. Lobo, Maria I. R. Lourenço
The Newtonian -body problem in the zero-energy, zero-linear-momentum, and zero-angular-momentum sector provides a time-reversal-invariant setting in which generic complete solut…