A pointwise approximation theorem for linear combinations of Bernstein polynomials. Guo, Shunsheng; Yue, Shujie; Li, Cuixiang; Yang, Ge; Sun, Yiguo — 1996 Abstract and Applied Analysis
Simultaneous approximation for Szász-Mirakian quasi-interpolants Shunsheng Guo; Qiu Lan Qi — 2006 Czechoslovak Mathematical Journal We obtain simultaneous approximation equivalence theorem for Szász-Mirakian quasi-interpolants.