Dorai, Abderraouf; Chil, Elmiloud; Wójtowicz, Marek Korovkin-type approximation theory in Riesz spaces. (English) Zbl 1491.46005 Mediterr. J. Math. 15, No. 4, Paper No. 169, 1-14 (2018). MSC: 46A40 06F25 41A35 PDFBibTeX XMLCite \textit{A. Dorai} et al., Mediterr. J. Math. 15, No. 4, Paper No. 169, 1--14 (2018; Zbl 1491.46005) Full Text: DOI
Wiśniewska, Halina; Wójtowicz, Marek Approximations of the Korovkin type in Banach lattices. (English) Zbl 1312.41032 Rev. R. Acad. Cienc. Exactas Fís. Nat., Ser. A Mat., RACSAM 109, No. 1, 125-134 (2015). MSC: 41A36 41A65 46B42 47B65 PDFBibTeX XMLCite \textit{H. Wiśniewska} and \textit{M. Wójtowicz}, Rev. R. Acad. Cienc. Exactas Fís. Nat., Ser. A Mat., RACSAM 109, No. 1, 125--134 (2015; Zbl 1312.41032) Full Text: DOI