3 papers
physics.hist-ph2025
An account of the arrow of time when scale is surplus
Sean Gryb, Simon Friederich
Existing accounts of the cosmological arrow of time face a dilemma: generalist approaches that posit time-asymmetric laws lack independent motivation, while particularist approache…
physics.hist-ph2025
Gauge symmetry and the arrow of time: How to count what counts
Sean Gryb
This thesis addresses two major problems in the philosophy of physics. The first is how to identify the minimal physical content of a theory; that is, what features of a theory are…
gr-qc2024
How closed is cosmology?
Sean Gryb, David Sloan
Classical cosmology exhibits a particular kind of scaling symmetry. The dynamics of the invariants of this symmetry forms a system that exhibits many of the features of open system…