数学物理学报

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Gamma 算子在 Lp (1≤p ≤∞)空间带权同时逼近的强逆不等式

齐秋兰;郭顺生;黄苏霞   

  1. 河北师范大学数学与信息科学学院 石家庄 050016
  • 收稿日期:2006-08-13 修回日期:2007-08-18 出版日期:2008-06-25 发布日期:2008-06-25
  • 通讯作者: 齐秋兰
  • 基金资助:
    国家自然科学基金(10571040)、河北师范大学博士基金(L2002B03)资助

Strong Converse Inequalities for Weighted Simultaneous

Approximation by Gamma Operators in Lp (1≤p ≤∞) Spaces

Qi Qiulan; Guo Shunsheng;Huang Suxia
  

  1. College of Mathematics and Information Science, Hebei Normal University, Shijiazhuang 050016
  • Received:2006-08-13 Revised:2007-08-18 Online:2008-06-25 Published:2008-06-25
  • Contact: Qi Qiulan

摘要: 该文利用修正的带权 K- 泛函K2σ f, t2)w,p, 考虑Gamma算子在Lp~ (1≤p ≤∞)空间带权同时逼近, 给出了它的 B -型强逆不等式.

关键词: Gamma算子, 逼近, K -泛函, 强逆不等式

Abstract: In this paper, the authors consider the weighted simultaneous approximation by the Gamma operator and establish the strong converse inequality of type $B$ for the operator with the weighted $K$-functional $K^2_{\varphi}(f, t^2)_{w,p}$ in the space $L_p\;(1\le p\le \infty)$.

Key words: Gamma operator, Approximation, K -functional, Strong converse inequality

中图分类号: 

  • 41A10