2 papers
physics.hist-ph2025
Natural Theories
James Owen Weatherall, Eleanor March
We consider the class of physical theories whose dynamics are given by natural equations, which are partial differential equations determined by a functor from the category of n-ma…
physics.hist-ph2025
A Puzzle About General Covariance and Gauge
Eleanor March, James Owen Weatherall
We consider two simple criteria for when a physical theory should be said to be "generally covariant", and we argue that these criteria are not met by Yang-Mills theory, even on ge…