We show that the E-cohomological Conley index, that was introduced by the first author recently, has a natural module structure. This yields a new cup-length and a lower bound for the number of critical points of functionals on Hilbert spaces. When applied to the setting of the Arnold conjecture, this paves the way to a short proof on tori, where it was first shown by C. Conley and E. Zehnder in 1983.
Authors
- dr inż. Maciej Starostka link open in new tab ,
- Nils Waterstraat
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1515/ans-2019-2044
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2019