Abstract
This proposed symposium brings together four philosophers of physics to discuss the interrelated web of topics surrounding theoretical equivalence in physics, the structure of physical theories, and the interpretation of those theories. In particular, it offers a variety of perspectives on the recent flowering of work on formal notions of equivalence: the different symposium participants give different accounts of the significance of such work, and of where that significance derives from. It also addresses topics such as the role of symmetry in physics, whether isomorphic models must represent the same physical situation, and the role of convention in physical theorising.
