对合Quantale范畴的逆系统

本文得到了对合Quantale范畴逆系统及逆极限的结构,引入了两个逆系统之间映射的概念,给出了逆极限之间的极限映射,并研究了它们的若干性质.     

对合Quantale同余关系

给出对合Quantale同余的概念,得到了对合Quantale同余的一些性质,讨论了对合Quantale同余与同态之间的关系,最后给出了对合Quantale乘积上的同余关系的结构。     

对合Quantale中对合运算与特殊元的关系

结合Quantale中的特殊元（如对称元、左（右）准对称元、左（右，双）边元、Locale元、正则元），完备格中的〈〈、△关系，紧元、超紧元以及对舍Quantale中的对合运算＊等概念，讨论了它们之间的关系。     

Quantale范畴的代数性

本文讨论了Quantale的范畴性质,给出了余等子和自由Quantale的结构,证明了Quantale范畴是代数范畴．     

Quantale的若干新的性质

讨论Quantale的若干性质，给出Prequantale构成Quantale的两个充要条件，论证在严格双侧Quantale上逆序对合对应的惟一性并给出了Quantale是分配格的一个条件。     

单纯Quantale及其Quantale商

讨论Quantale上的同余与Quantale商之间的关系,研究单纯Quantale的性质,给出一类Quantale是单纯Quantale的等价刻画。最后从Quantale商的角度对单纯Quantale进行了研究,得到单纯Quantale的若干特征定理。     

对偶Quantale上的Par运算及其性质

在对偶Quantale上定义了Par运算凵,并研究了其性质.给出了单位Quantale是对偶Quantale的充要条件,在此基础上得出对偶Quantale的等价刻画.证明了在一定条件下对偶Quantale的子Quantale亦是对偶Quantale.     

余Quantale及其性质

讨论余Quantale的一些性质,引入预余Quantale的概念并给出预余Quantale成为余Quantale的充要条件,构造了一些子余Quantale结构。     

幂等余 Quantale

讨论了幂等余Quantale与左纯元、子余Quantale的一些相关性质,发现幂等余Quantale的左纯元构成的集合是对应的子余Quantale;每个幂等余Quantale都可有一个核映射与子余Quantale保持对应关系;并且幂等余Quantale与核映射,左右纯元,Frame等都有一定关系.     

模糊集Quantale与Quantale的嵌入

给出模糊集Quantale的定义,在此基础上对Quantale与它对应的模糊集Quantale二者之间的关系进行比较,得到如果一个Quantale是可换的、单位的,则它的模糊集Quantale也是可换的、单位的结论。然后给出Quantale的一种嵌入方式。     

Study of the blow-up of solutions of systems of equations of hydrodynamic type

Mathematical Notes - We study the initial boundary-value problem for three-dimensional systems of equations of pseudoparabolic type. The system is similar to the Oskolkov system, but differs from...     

Characterization of types of asymptotic discernibility of families of hypotheses

We give a characterization of the types of asymptotic discernibility of families of hypotheses in the case of hypothetical measures that are not, in general, mutually absolutely continuous. The case when the logarithm of the likelihood ratio admits an asymptotic expansion of the type of an expansion with local asymptotic normality is examined in detail. Examples are studied.Translated fromTeoriya Sluchainykh Protsessov, Vol. 15, pp. 64–71, 1987.     

Distribution of types of symmetry of tensors of high degree

The asymptotic distribution of tensors of degree N in symmetry types is studied in this paper.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 155, pp. 181–186, 1986.     

Axiomatizability of reducts of algebras of relations

In this paper, we prove that any subreduct of the class of representable relation algebras whose similarity type includes intersection, relation composition and converse is a non-finitely axiomatizable quasivariety and that its equational theory is not finitely based. We show the same result for subreducts of the class of representable cylindric algebras of dimension at least three whose similarity types include intersection and cylindrifications. A similar result is proved for subreducts of the class of representable sequential algebras. Received October 7, 1998; accepted in final form September 10, 1999.     

Lengths of periods of continued fractions of square roots of integers

Empirical study of the period’s length T of the continued fractions of $\sqrt{Q}$ (for growing integers Q) shows several strange asymptotical results, for instance, $T\leq C\sqrt{Q}\ln{Q}$ . These results show important differences between the statistics of the elements of the continued fractions of random real numbers and of square roots of random integers.