Sakar, F. MügeGuney, H. OzlemBagcı, Yasemin2024-04-242024-04-2420182146-1147https://search.trdizin.gov.tr/yayin/detay/313299https://hdl.handle.net/11468/27994In the present study, we introduce an investigation of new subclasses of har-monic functions which are defined by fractional operator. Firstly, using by fractional operator, we define new subclasses of harmonic functions. Later, we obtain main theo-rems of our study which contain su?cient and necessary coe?cient bounds for functions related to the classes newly defined. Also, several particular characterization proper-ties of these classes are given. Some of these properties involve extreme points, convex combination, distortion bounds. Finally, several corollaries of the main theorems are presented.eninfo:eu-repo/semantics/openAccessArticle81155166313299