On Еc-Continuous and δ-ßc-Continuous Mappings in Topological Spaces Via Еc-open and δ-ßc-open sets. Iraqi Journal of Science [Internet]. 2022 Jul. 31 [cited 2024 May 4];63(7):3120-34. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/3070