Gungor, Gonca DurmazAltun, Ishak2025-01-212025-01-2120242073-8994https://doi.org/10.3390/sym16010099https://hdl.handle.net/20.500.12587/24167We introduce the new idea of (alpha - theta(sigma))-contraction in quasi-metric spaces in this paper. For these kinds of mappings, we then prove new fixed-point theorems on left K, left M, and left Smyth-complete quasi-metric spaces. We also apply our results to infer the existence of a solution to a second-order boundary-value problem.eninfo:eu-repo/semantics/openAccessquasi-metric space; left K-Cauchy sequence; alpha-admissible mapping; fixed pointArticle16110.3390/sym160100992-s2.0-85183096349Q1WOS:001152961300001N/A