Memoirs of the American Mathematical Society 2009; 141 pp; softcover Volume: 202 ISBN10: 0821844989 ISBN13: 9780821844984 List Price: US$70 Individual Members: US$42 Institutional Members: US$56 Order Code: MEMO/202/950
 This memoir attempts at a systematic study of convergence to stationary state for certain classes of degenerate diffusive equations, taking the general form \({\frac{\partial f}{\partial t}}+ L f =0\). The question is whether and how one can overcome the degeneracy by exploiting commutators. Table of Contents  Introduction
 \(L=A^*A+B\)
 The auxiliary operator method
 Fully nonlinear equations
 Appendices
 Bibliography
