Karapınar, ErdalAgarwal, Ravi P.Karapinar, ErdalRoldan Lopez de Hierro, Antonio FranciscoMathematics2024-07-052024-07-05201671578-73031579-150510.1007/s13398-015-0242-62-s2.0-84981719341https://doi.org/10.1007/s13398-015-0242-6https://hdl.handle.net/20.500.14411/638Roldán López de Hierro, Antonio Francisco/0000-0002-6956-4328; KARAPINAR, ERDAL/0000-0002-6798-3254; Agarwal, Ravi P/0000-0003-0075-1704In this report, we present some new fixed points theorems in the context of quasi-metric spaces that can be particularized in a wide range of different frameworks (metric spaces, partially ordered metric spaces, G-metric spaces, etc.). Our contractivity conditions involve different classes of functions and we study the case in which they only depend on a unique variable. Furthermore, we do not only introduce new contractivity conditions, but also expansivity conditions. As a consequence of our results, we announce that many fixed point results in G-metric spaces can be derived from the existing results if all arguments are not distinct.eninfo:eu-repo/semantics/closedAccessFixed pointQuasi-metric spaceG-metric spacesContractivity conditionPicard sequenceArticleQ1Q11102433456WOS:000381578800009