关于Locale范畴反射子范畴的注解

利用Locale中的完全正则元和零维元构造性地给出了任意Locale的完全正则反射以及零维反射的描述,并且对于满足‘(?)’关系插入性的Locale,特别地,对正规Locale,证明了全体正则元构成的Locale是其正则反射.进而,利用平稳(flat)子Locale的扩张引理给出了Locale的紧完全正则反射,紧零维反射以及紧正则反射的构造性描述.     

Locale范畴的反射子范畴

本文研究ｌｏｃａｌｅ范畴的反射子范畴，给出反射子范畴的刻划定理，从一般的ｌｏｃａｌｅ出发，完全构造性地给出了ｌｏｃａｌｅ的正则反射、完全正则反射和零维反射的构造．     

Locale的函数空间

构造性地定义了Locale间的Isbell,紧开及点态函数空间,研究了其良好的范畴性质(Proper和Admissible性质)及分离性质.重新得到了有指数Locale的结构.这些工作是寻找Locale范畴中的方便范畴的基础.     

Locale的函数空间

构造性地定义了Locale间的Isbell,紧开及点态函数空间,研究了其良好的范畴性质(Proper和Admissible性质)及分离性质.重新得到了有指数Locale的结构.这些工作是寻找Locale范畴中的方便范畴的基础。     

Locale范畴中的零维性

本文讨论ｌｏｃａｌｅ的零维性质，主要结果有：（１）给出ｌｏｃａｌｅＡ的核映射（ｎｕｃｌｅｕｓ）构成的ｌｏｃａｌｅＮ（Ａ）中上确界的点式刻划，并得到了Ｎ（Ａ）的紧性与Ａ的紧性之间的关系；（２）给出零维ｌｏｃａｌｅ与ｃｏｈｅｒｅｎｔｌｏｃａｌｅ之间的关系，以及零维ｌｏｃａｌｅ的紧零维反射；（３）给出零维ｌｏｃａｌｅ范畴在ｌｏｃａｌｅ范畴中的刻划．     

Locale的正则紧反射

ｌｏｃａｌｅ的正则紧反射函子的构造的明确描述问题是由ＢａｎａｓｃｈｅｗｓｋｉＢ．和ＭｕｌｖｅｙＣ．Ｊ．于１９８０年提出的,十多年来一直没有进展。本文通过在ｌｏｃａｌｅ上引入一种二元关系,给出了ｌｏｃａｌｅ的正则紧反射函子的构造性描述。     

Locale的仿紧完全正则反射

1972年, Isbell利用locale中由正规覆盖构成的一致结构的完备化, 证明了仿紧完全正则locale范畴是locale范畴的满反射子范畴. 本文通过在locale的补零元理想格上做核映射的方法, 给出locale的仿紧完全正则反射的明确构造, 并证明locale的仿紧完全正则反射是locale的 Stone-Čech紧化的子locale.     

一类变换半群的正则元

在等价关系E(∈)F的假设下,给出了变换半群TFE(X)的正则元的性质.利用这些性质,简化了正则元的格林关系,得到了更为简单的描述.     

关于弱正则空间的闭扩充

在此文中我们分别给出了刻画第一可数弱正则一闭拓空间和第一可数弱正则一极小拓扑空间的等价性定理，同时我们还证明了第一个局部弱紧的第一可为九弱正则空间都存在一个第一可数弱正则一闭扩充，此定理在表达形式上数拟于Ｒ．Ｍ．Ｓｔｅｐｈｅｎｓｏｎ等人对ｐ＝第一可数完全正则，或第一可数Ｕｒｙｓｏｈｎ以及第一可数零维时的结果。     

L-fuzzy拓扑空间的弱诱导化

对任一L-fuzzy拓扑空间,本文给出了两个与之密切相关的弱诱导空间,从而证明了弱诱导空间范畴是一般fuzzy拓扑空间范畴的反射和余反射满子范畴.特别地我们较详细地讨论了次T_o完全正则空间的弱诱导化.     

Estimation of the measure of the image of the ball

Under study is the class of ring Q-homeomorphisms with respect to the p-module. We establish a criterion for a function to belong to the class and solve a problem that stems from M. A. Lavrentiev [1] on the estimation of the measure of the image of the ball under these mappings. We also address the asymptotic behavior of these mappings at a point.     

On the distributions of the ratios of the extreme roots to the trace of the Wishart matrix

In this paper, the authors cosider the derivation of the exact distributions of the ratios of the extreme roots to the trace of the Wishart matrix. Also, exact percentage points of these distributions are given and their applications are discussed.     

On the rational approximation of the sum of the reciprocals of the Fermat numbers

Let $\mathcal{G}(z):=\sum_{n\geqslant0} z^{2^{n}}(1-z^{2^{n}})^{-1}$ denote the generating function of the ruler function, and $\mathcal {F}(z):=\sum_{n\geqslant} z^{2^{n}}(1+z^{2^{n}})^{-1}$ ; note that the special value $\mathcal{F}(1/2)$ is the sum of the reciprocals of the Fermat numbers $F_{n}:=2^{2^{n}}+1$ . The functions $\mathcal{F}(z)$ and $\mathcal{G}(z)$ as well as their special values have been studied by Mahler, Golomb, Schwarz, and Duverney; it is known that the numbers $\mathcal {F}(\alpha)$ and $\mathcal{G}(\alpha)$ are transcendental for all algebraic numbers α which satisfy 0<α<1. For a sequence u, denote the Hankel matrix $H_{n}^{p}(\mathbf {u}):=(u({p+i+j-2}))_{1\leqslant i,j\leqslant n}$ . Let α be a real number. The irrationality exponent μ(α) is defined as the supremum of the set of real numbers μ such that the inequality |α?p/q|<q ^?μ has infinitely many solutions (p,q)∈?×?. In this paper, we first prove that the determinants of $H_{n}^{1}(\mathbf {g})$ and $H_{n}^{1}(\mathbf{f})$ are nonzero for every n?1. We then use this result to prove that for b?2 the irrationality exponents $\mu(\mathcal{F}(1/b))$ and $\mu(\mathcal{G}(1/b))$ are equal to 2; in particular, the irrationality exponent of the sum of the reciprocals of the Fermat numbers is 2.     

Refinement of the asymptotics of the power of the quantile test

One investigates the asymptotic properties of the quantile test, similar to the properties of the Pearson's chi-square test of fit.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 153, pp. 5–15, 1986.The author is grateful to D. M. Chibisov for useful remarks.