| Title | Periodic Solutions of Second-Order Differential Equations in Hilbert Spaces |
| Publication Type | Journal Article |
| Year of Publication | 2021 |
| Authors | Fonda, A, Klun, G, Sfecci, A |
| Volume | 18 |
| Issue | 5 |
| Pagination | 223 |
| Date Published | 2021/09/07 |
| ISBN Number | 1660-5454 |
| Abstract | We prove the existence of periodic solutions of some infinite-dimensional systems by the use of the lower/upper solutions method. Both the well-ordered and non-well-ordered cases are treated, thus generalizing to systems some well-established results for scalar equations. |
| URL | https://doi.org/10.1007/s00009-021-01857-8 |
| Short Title | Mediterranean Journal of Mathematics |
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