Memoirs of the American Mathematical Society 1999; 82 pp; softcover Volume: 140 ISBN10: 0821811827 ISBN13: 9780821811825 List Price: US$48 Individual Members: US$28.80 Institutional Members: US$38.40 Order Code: MEMO/140/668
 Readership Graduate students and research mathematicians working in partial differential equations. Table of Contents  Introduction
 Main results
 The center manifold reduction
 Center manifolds of (1.1), (1.2)
 The algebraic independence condition
 Perturbation of the domain
 A selection of eigenfunctions in highdimensional eigenspaces
 Eigenfunctions with separable variables
 Completion of proofs
 References
