Karapınar, ErdalAlqahtani, BadrFulga, AndreeaKarapinar, ErdalMathematics2024-07-052024-07-052018302227-739010.3390/math61002082-s2.0-85055332814https://doi.org/10.3390/math6100208https://hdl.handle.net/20.500.14411/2663KARAPINAR, ERDAL/0000-0002-6798-3254; Fulga, Andreea/0000-0002-6689-0355In this paper, in the setting of D - symmetric quasi- metric spaces, the existence and uniqueness of a fixed point of certain operators are scrutinized carefully by using simulation functions. The most interesting side of such operators is that they do not form a contraction. As an application, in the same framework, the Ulam stability of such operators is investigated. We also propose some examples to illustrate our results.eninfo:eu-repo/semantics/openAccessquasi-metric spaceDelta-symmetryfixed point theoremsmetric spaceArticleQ1610WOS:000448552600036