The Pointwise Estimate for Stancu-Sikkema Operators
Received:January 18, 2000  
Key Words: Stancu-Sikkema operators   modulus of smoothness   K-functional.  
Fund Project:Supported by NSF of Hebei Province (101090)
Author NameAffiliation
LIU Xi-wu Center
of Comp.
Hebei University of Economy & Trade
Shijiazhuang
China 
GUO Shun-sheng Dept. of Math.
Hebei Normal University
China 
LIU Li-xia Dept. of Math.
Hebei Normal University
China 
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Abstract:
      In this paper, we construct Stancu-Sikkema operators and obtain the point-wise direct and converse theorems in terms of pointwise modulus of smoothness. Some results about Bernstein-Sikkema operators and Stancu operators are extended.
Citation:
DOI:10.3770/j.issn:1000-341X.2003.01.010
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