bin Rasedee, AFNAFNbin RasedeeRakhimov, AARakhimovAhmedov, AAAAAhmedovIshak, NNIshakHamzah, SRSRHamzah2024-05-292024-05-2920170094-243X10.1063/1.4980983WOS:000405092300120https://oarep.usim.edu.my/handle/123456789/10969This article investigates a function f (x), constructed from the Nikol'skii class in S-2. The estimation obtained will show that the Riesz mean of the spectral expansions is unable to be strengthened due to absence of localization caused by a singualrity at a definite point f (x), on the sphere.en-USArticle1830