Improving on Expectation Propagation 2 2 T48 Manfred Opper, Ulrich Paquet, Ole Winther µ2 0 µ2 0 µ1 2 0 -2 -2 -2 -2 0 2 µ1 p(x) and EP + 1st order correction p(x) and EP q (x) · An intractable (posterior) distribution p(x) = an approximating q (x) plus a perturbation power series of error terms of the approximation. · Application to mixture, Gaussian process classification, and Ising models.