%0 Conference Paper
%A Belot, Gordon
%D 2011
%F pittphilsci:9275
%K Symmetry, equivalence, Lie, Noether
%T Symmetry and Equivalence
%U http://philsci-archive.pitt.edu/9275/
%X This paper is concerned with the relation between two notions: that of two solutions or models of a theory being related by a symmetry of the theory and that of solutions or models being physically equivalent (in the sense of being equally well- or ill-suited to represent any given situation, relative to any reasonable interpretation). A number of authors have recently discussed this relation, some taking an optimistic view, on which there is a suitable concept of the symmetry of a theory relative to which these two notions coincide, others taking a pessimistic view, on which there is no such concept. The present paper arrives at a cautiously pessimistic conclusion.