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arXiv math/0511479math.CA
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关于积分微分集的完全刻划

On the complete characterization of differentiation sets of integrals

G. A. Karagulyan

摘要:

令$B_θ$为平面$R^2$中的矩形族,其与横坐标具有斜率$θ$。我们称一个斜率集$Θ$是$D$ -集,如果存在一个函数$f\in L(R^2)$,使得基$B_θ$对$f$的积分几乎处处可微,如果$θ\not\inΘ$和$\bar D_θf(x)=\infty $,如果$θ\inΘ$ .如果条件$\bar D_θf(x)=\infty $在一组正测度上成立(而不是a.e.)我们将说它是$WD$集。证明了$Θ$是$D$ -集($WD$ -集)当且仅当它是$G_δ$($G_{δσ}$).

英文摘要:

Let $B_θ$ be the family of rectangles in the plane $R^2$, having slope $θ$ with the abscissa. We say a set of slopes $Θ$ is $D$-set if there exists a function $f\in L(R^2)$, such that the basis $B_θ$ differentiates integral of $f$ if $θ\not\inΘ$ and $\bar D_θf(x)=\infty $ almost everywhere if $θ\inΘ$. If the condition $\bar D_θf(x)=\infty $ holds on a set of positive measure (instead of a.e.) we shall say it is $WD$-set. It is proved, that $Θ$ is $D$-set($WD$-set) if and only if it is $G_δ$($G_{δσ}$).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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