Taşdelen, Fatma; Aktaş, Rabia; Erkuş-Duman, Esra Harmonic functions associated with some polynomials in several variables. (English) Zbl 1424.33026 Turk. J. Math. 42, No. 4, 1803-1814 (2018). MSC: 33C55 33C47 PDFBibTeX XMLCite \textit{F. Taşdelen} et al., Turk. J. Math. 42, No. 4, 1803--1814 (2018; Zbl 1424.33026) Full Text: DOI
Doğru, Ogün; Erkuş-Duman, Esra Korovkin type error estimates for positive linear operators involving some special functions. (English) Zbl 1176.41019 Turk. J. Math. 33, No. 1, 41-53 (2009). MSC: 41A25 41A30 41A36 33C45 33C50 PDFBibTeX XMLCite \textit{O. Doğru} and \textit{E. Erkuş-Duman}, Turk. J. Math. 33, No. 1, 41--53 (2009; Zbl 1176.41019)