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Bibliographic Details
Main Authors: Ortega, Rafael, Urena, Antonio J.
Format: Preprint
Published: 2025
Subjects:
Online Access:https://arxiv.org/abs/2509.10457
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Table of Contents:
  • Given a real valued function having a nondegenerate compact manifold of critical points, some of these points survive under small $C^2$ perturbations. This is a well-known result in critical point theory. In 1986 Weinstein obtained the analogous conclusions when the perturbation is only $C^2$ and the ambient space is a finite dimensional manifold. In this work we present a complete proof for $C^1$ perturbations in infinite dimensional Hilbert spaces.