Matteo Polettini - University of Luxembourg # The gauge symmetry of nonequilibrium thermodynamics # Picking up a thread of discussion initiated at the 15th Pama Seminar, I will discuss how to reconcile non-invariance of the Gibbs-Shannon entropy under coodinate transformations with the required invariance of the laws of thermodynamics, a problem that mingles with that of the apparent subjectivity of the information-theoretic approach to Statistical Mechanics. In particular, I will show how to derive general features of thermodynamics from a gauge principle, I will discuss the gauge connection and its curvature, and I will give an application to the Minimum Entropy Production Priciple.