# Prescribing symmetric functions of the eigenvalues of the Ricci tensor

 PRINCETON-RUTGERS-IAS JOINT ANALYSIS SEMINAR Topic: Prescribing symmetric functions of the eigenvalues of the Ricci tensor Speaker: Matt Gursky Affiliation: University of Notre Dame Date: Thursday, December 9 Time/Room: 3:30pm - 4:30pm/Fine Hall 214

In joint work with J. Viaclovsky, we studied the problem of prescribing symmetric functions of the eigenvalues of the Schouten tensor for a conformal metric on a compact manifold (often referred to as the "Sigma-k Yamabe problem"). This is equivalent to solving a fully nonlinear elliptic equation of second order. Assuming the function satisfies certain structural conditions, and the underlying manifold satisfies a natural 'admissibility' condition, we prove a priori estimates for solutions. The proof involves a blow-up analysis and classification of certain global singular solutions.