Georgiev, Svetlin G.Akgol, Sibel DogruKus, M. EymenMathematics2024-07-052024-07-05202300354-518010.2298/FIL2310029G2-s2.0-85149740933https://doi.org/10.2298/FIL2310029Ghttps://hdl.handle.net/20.500.14411/2567Doğru Akgöl, Sibel/0000-0003-3513-1046; Kus, Murat Eymen/0000-0003-1960-1706In this paper we study a class of first order impulsive periodic boundary value problems on time scales. We give conditions under which the considered problem has at least one and at least two solutions. The arguments are based upon recent fixed point index theory in cones of Banach spaces for a k-set contraction perturbed by an expansive operator. An example is given to illustrate the obtained result.eninfo:eu-repo/semantics/openAccessPBVPsconek-set contractionexpansive operatorsum of operatorsexistence of solutionsArticleQ3371030293042WOS:000937469600003