An Alternative Approach to Multivalued F-Contractions in Ultrametric Spaces

This paper establishes new fixed point theorems based on the concept of F-contractions. The results are formulated for multivalued mappings of rational type defined on spherically complete ultrametric spaces. Several special cases are discussed, some of which generalize or improve upon known results. Illustrative examples are provided to support the theoretical findings. Furthermore, an alternative generalization involving almost contractive multivalued mappings of rational type is also presented within the framework of F -contractions.