Srivastava, H.M.Tahir, MuhammadKhan, BilalAhmad, Qazi ZahoorKhan, Nazar2019-03-212019-03-2120192019Srivastava, H.M., Tahir, M., Khan, B., Ahmad, Q.Z. & Khan, N. (2019). Some General Classes of q-Starlike Functions Associated with the Janowski Functions. Symmetry, 11(2), 292. https://doi.org/10.3390/sym11020292https://doi.org/10.3390/sym11020292http://hdl.handle.net/1828/10660By making use of the concept of basic (or q-) calculus, various families of q-extensions of starlike functions of order α in the open unit disk U were introduced and studied from many different viewpoints and perspectives. In this paper, we first investigate the relationship between various known classes of q-starlike functions that are associated with the Janowski functions. We then introduce and study a new subclass of q-starlike functions that involves the Janowski functions. We also derive several properties of such families of q-starlike functions with negative coefficients including (for example) distortion theorems.enanalytic functionsunivalent functionsstarlike and q-starlike functionsq-derivative (or q-difference) operatorsufficient conditionsdistortion theoremsJanowski functionsArticleDepartment of Mathematics and Statistics