Group invariant variational principles

In this paper we introduce a group invariant version of the well-known Ekeland variational principle. To achieve this, we define the concept of convexity with respect to a group and establish a version of the theorem within this framework. Additionally, we present several consequences of the group i...

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Bibliographic Details
Published in:Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A, Matemáticas Físicas y Naturales. Serie A, Matemáticas, 2024-07, Vol.118 (3), Article 91
Main Authors: Falcó, Javier, Isert, Daniel
Format: Article
Language:English
Subjects:
Applications of Mathematics
Continuity (mathematics)
Convexity
Invariants
Mathematical and Computational Physics
Mathematics
Mathematics and Statistics
Original Paper
Theorems
Theoretical
Variational principles
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Summary:In this paper we introduce a group invariant version of the well-known Ekeland variational principle. To achieve this, we define the concept of convexity with respect to a group and establish a version of the theorem within this framework. Additionally, we present several consequences of the group invariant Ekeland variational principle, including Palais-Smale minimizing sequences, the Brønsted-Rockafellar theorem, and a characterization of the linear and continuous group invariant functionals space. Moreover, we provide an alternative proof of the Bishop-Phelps theorem and proofs for the group-invariant Hahn-Banach separating theorems. Finally, we discuss some implications and applications of these results.
ISSN:1578-7303
1579-1505
DOI:10.1007/s13398-024-01585-0