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新疆大学数学系 ,新疆大学数学系
Published:1992
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[1]庄碧如,万传良.Jackson积分算子对连续函数的逼近[J].新疆大学学报(自然科学版),1992(02):39-45.
庄碧如, 万传良. Jackson积分算子对连续函数的逼近[J]. Journal of Xinjiang University (Natural Science Edition in Chinese and English), 1992, (2).
[1]庄碧如,万传良.Jackson积分算子对连续函数的逼近[J].新疆大学学报(自然科学版),1992(02):39-45. DOI:
庄碧如, 万传良. Jackson积分算子对连续函数的逼近[J]. Journal of Xinjiang University (Natural Science Edition in Chinese and English), 1992, (2). DOI:
设K.是Jackson算子Jn的逼近度。本文应用[2]中K2的积分表示
证明{K2N-1}渐减到K=3/πintegral from n=0 to ∞[4/πt](sint/t)~4dt并且对所有的u
有Ks≥K2=2(1-2/π31/2
以及inf sup||Jn(f)-f||e/ω(f
π/n+1)=K2=2(1-2/π31/2)
Let K. be the degree of approximation for the Jackson operator J. We apply the integral expres-sion of K. in[2]
prove that {K2N-1}is decreasingly to K=3/π integral from n=0 to ∞ [4/π t] (sint/t)4 dtAlso all K?≥K2=(1- 2/31/π)
and then inf sup ||Ja(f)-f||c/ω(f?π/(?)+1)c=K2=2(1-2/31/π)
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