H. Amann
  Institute for Mathematics, 
  University of Zürich
  Winterthurerstr 190, 8057 Zürich, 
  Switzerland  (email: sahmad@utsa.edu)

  A. Ambrosetti
  S.I.S.S.A., Classe di Matematica,
  Via Beirut 2-4
  34013 Trieste, Italy
  ( email: ambr@sissa.it )

  A. Bahri
  Department of Mathematics, 
  Rutgers University
  110 Frelinghuysen Rd., 
  Piscataway, NJ 08854, U.S.A

  V. Benci
  Dipartimento di Matematica Applicata “U. Dini”
  Universitą degli studi di Pisa
  Via Bonanno Pisano 25/b-56126 Pisa, Italy
  ( email: benci@dma.unipi.it )

  C. Cosner
  Department of Mathematics, 
  University of Miami
  Coral Gables, FL 33124, U.S.A.
  ( email. gcc@math.miami.edu )

  E. N. Dancer
  School of Mathematics, 
  University of Sydney
  Sydney, NSW 2006, Australia
  ( email: normd@maths.usyd.edu.au )

  Lawrence C. Evans
  Department of Mathematics,
  University of California, Berkeley,
  Berkeley, CA 94720, U.S.A.
  ( email: evans@math.berkeley.edu )

  D. Fortunato
  Dipartimento Interuniversitario di Matematica, 
  Universita degli Studi Politecnico di Bari, 
  Via Orabona 4, 70125 Bari, Italy
  ( email: fortunat@dm.uniba.it )

  R.A. Johnson
  Dipartimento di Sistemi e Informatica
  Universitą di Firenze,
  Via S. Marta, 3-50139 Firenze, Italy
  ( email: Johnson@dsi.unifi.it )

  P.E. Kloeden
  Fachbereich Mathematik, 
  J.W. Goethe Universitaet,
  D-60054 Frankfurt am Main, Germany
  ( email: kloeden@math.uni-frankfurt.de )

  Yiming Long
  Nankai Institute of Mathematics, 
  Nankai University,
  Tianjin 300071, P.R. China
  ( email: longym@nankai.edu.cn )

  J. Mawhin
  Institut Mathematique, Université 
  Catholique de Louvain, Chemin du 
  Cyclotron 2, B-1348 Louvainla-Neuve, 
  Belgium(email: mawhin@math.ucl.ac.be)

  R. Ortega
  Departamento de Matemática 
  Aplicada Universidad
  de Granada, 18071 Granada, Spain
  ( email: rortega@ugr.es )

  K. Palmer
  Department of Mathematics, National 
  Taiwan University
  Taipei, Taiwan
  ( email: palmer@math.ntu.edu.tw )

  I. Peral
  Div. Matemática, 
  Universidad Autonoma de Madrid
  Cantoblanco, 28049 Madrid, Spain
  ( email: ireneo.peral@uam.es )

  P. H. Rabinowitz
  Department of Mathematics,
  University of Wisconsin-Madison, 
  Van Vleck Hall, 480 Lincoln Drive, Madison, WI 
  33706, U.S.A. ( email: rabinowi@math.wisc.edu )

  K. Schmitt
  Department of Mathematics, 
  University of Utah, 
  Salt Lake City, Utah 84112-0090, U.S.A.
  ( email: schmitt@math.utah.edu )

  S. Solimini
  Dipartimento Interuniversitario di Matematica, 
  Universita degli Studi Politecnico di Bari,
  Via Orabona 4, 70125 Bari, Italy 
  ( email: solimini@dm.uniba.it )

  S. Terracini
  Universitą di Milano Bicocca
  Dipartmento di Matematica e Applicazioni
  Via Cozzi, 53 - 20125 Milano, Italy
  ( email: susanna.terracini@unimib.it )

  L. Véron
  Laboratoire de Mathématique et Physique Théorique 
  UMR 6083 du CNRS, Faculté des Sciences et Technique
  Parc de Grandmont, 37200 Tours, France 
  (email: veronl@univ-tours.fr)

  G. Vidossich
  S.I.S.S.A., Classe di Matematica
  Via Beirut 2-4, 
  34013 Trieste, Italy
  ( email: vidossic@sissa.it )

  F. Zanolin
  Dipartimento di Matematica ed Informatica, 
  Universitį di Udine, 
  Loc.Rizzi-33100 Udine, Italy
  ( email: zanolin@dimi.uniud.it )