Altınkaya, ŞahseneYalçın, Sibel2024-09-102024-09-102018-01-011303-5991https://doi.org/10.1501/Commual_0000000827https://hdl.handle.net/11452/44470In this work, we introduce two new subclasses S-Sigma m (alpha, lambda) and S-Sigma m (beta, lambda) of Sigma(m) consisting of analytic and m -fold symmetric bi-univalent functions in the open unit disc U. Furthermore, for functions in each of the subclasses introduced in this paper, we obtain the coefficient bounds for vertical bar a(m)+1 vertical bar and alpha(2m)+1 vertical bar.eninfo:eu-repo/semantics/closedAccessCoefficient boundsGeneral subclassAnalytic functionsM-fold symmetric bi-univalent functionsCoefficient boundsScience & technologyPhysical sciencesMathematicsArticle293667110.1501/Commual_0000000827