Electronic Journal of Differential Equations,
Conference 06 (2001), pp. 1-11.

Title: An estimate on the relative Morse index for strongly indefinite functionals

Authors: A. Abbondandolo (Scuola Normale Superiore, Pisa, Italy)
  P. Felmer (Univ. de Chile, Santiago, Chile)
  J. Molina (Univ. de Concepcoin, Chile)
 
Abstract: 
  We extend the Benci and Rabinowitz linking theorem to strongly indefinite 
  functionals satisfying the Palais-Smale condition. More precisely, we 
  show an upper estimate for a relative Morse index of critical points.

Published January 8, 2001.
Math Subject Classifications: 58E05.
Key Words: Critical point; Morse index.