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L1(Χ)的一些性质
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作者 张庆洪 《南开大学学报(自然科学版)》 CAS CSCD 1991年第3期9-14,共6页
关键词 弱拓扑 Mackey拓扑 可赋范空间
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AVERAGE σ-K WIDTH OF CLASS OF L_p(R^n) IN L_q (R^n) 被引量:7
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作者 LIU YONGPING(Department of Mathematics, Beijing Normal University, Beliing 100875, China.) 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 1995年第3期351-360,共10页
The average σ-K width of the Sobolev-Wiener class in Lq(Rn) is studied for and the asymptotic behaviour of this quantity is determined. The exact value of average σ-K width of some class of smooth functions in L2(Rn... The average σ-K width of the Sobolev-Wiener class in Lq(Rn) is studied for and the asymptotic behaviour of this quantity is determined. The exact value of average σ-K width of some class of smooth functions in L2(Rn) is obtained. 展开更多
关键词 Average σ-K width Optimal subspace Sobolev-Wiener class Riesz potential.
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