共查询到4条相似文献,搜索用时 49 毫秒
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How to design the parabolic counterpart of the nonlinear elliptic equation involving function of the eigenvalues of the Hessian is discussed and the first initial-boundary value problem for such a parabolic equation is studied. 相似文献
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NA序列重对数律的几个极限定理 总被引:7,自引:2,他引:5
设{X_n;n≥1}均值为零、方差有限的NA平稳序列。记S_n=∑_(k=1)~n X_k,M_n=maxk≤n|S_k|,n≥1.假设σ~2=EX_1~2+2∑_(k=2)~∞EX_1X_k>0。本文讨论了:当ε 0时,P{M_n≥εσ(2nloglogn)~(1/2)的一类加权级数的精确渐近性质,以及当ε∞时,P{M_n≤εσ(π~2n/(8loglogn))~(1/2)}的一类加权级数的精确渐近性质。这些性质与重对数律和Chung重对数律的速度有关。 相似文献
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In the Hardy space H
p, (p1, 0< 1, H
p,1 H
p) we develop best linear approximation methods (previously studied by Taikov and Ainulloev) for the classes W(r,,) of analytic functions on the unit disk and calculate the exact values of linear, Gelfand, and informational n-widths of these classes. 相似文献