Quasi—conformally Flat Manifolds with Constant Scalar Curvature

§１．　ＩｎｔｒｏｄｕｃｔｉｏｎＬｅｔＭｂｅａｎｎ－ｄｉｍｅｎｓｉｏｎａｌｃｏｎｆｏｒｍａｌｌｙｆｌａｔｍａｎｉｆｏｌｄｗｉｔｈｃｏｎｓｔａｎｔｓｃａｌａｒｃｕｒｖａｔｕｒｅρ（ｎ≥３）．ＷｈｅｎｔｈｅＲｉｃｃｉｃｕｒｖａｔｕｒｅＳｏｆＭｉｓｏｆｂｏｕｎｄｅｄｂｅｌｏｗａｎｄｙＳｙ２＜ρ２／（ｎ－１），Ｇｏｌｄ－ｂｅｒｇｐｒｏｖｅｄｔｈａｔＭｉｓｏｆｃｏｎｓｔａｎｔｃｕｒｖａｔｕｒｅ［１］．ＷｈｅｎＭｉｓａｃｏｍｐａｃｔｍａｎｉｆｏｌｄｗｉｔｈｐｏｓｉｔｉｖｅＲｉｃｃｉｃｕｒｖａｔｕｒｅ，ＷｕＢ…     

A New Class of Generalized Landau Linear Positive Operator Sequence and Its Properties of Approximation

§１．　ＩｎｔｒｏｄｕｃｔｉｏｎＩｎ１９０８，Ｅ．Ｌａｎｄａｕｉｎｔｒｏｄｕｃｅｄｔｈｅｆｏｌｌｏｗｉｎｇｗｅｌｌｋｎｏｗｎｓｅｑｕｅｎｃｅｏｆｏｐｅｒａｔｏｒｓ［１］Ｌｎ［ｆ（ｔ）；ｘ］＝Ｋｎ∫１－１ｆ（ｔ）［１－（ｔ－ｘ）２］ｎｄｔ，　　　　（１．１）ｗｈｅｒｅ　　　　　Ｋｎ＝［∫１｛－１（１－ｔ２）ｎｄｔ］－１～ｎπ　　（ｎ→∞）．（１．１）ｗａｓｕｓｅｄｉｎｔｈｅｐｒｏｏｆｏｆｔｈｅＷｅｉｅｒｓｔｒａｓｓＴｈｅｏｒｅｍ．Ｓｉｎｃｅｔｈｅｎ，ｔｈｅａｐｐｒｏｘｉｍａｔｉｏｎｐｒｏｐ－ｅｒｔ…     

CONVERGENCE ON RANDOMLY TRIMMED SUMS WITH A DEPENDENT SAMPLE

§１．ＩｎｔｒｏｄｕｃｔｉｏｎａｎｄＲｅｓｕｌｔｓＬｅｔ｛Ｘｎ，ｎ１｝ｂｅａｓｅｑｕｅｎｃｅｏｆｒａｎｄｏｍｖａｒｉａｂｌｅｓｗｉｔｈａｃｏｍｍｏｎｄｉｓｔｒｉｂｕｔｉｏｎｆｕｎｃｔｉｏｎＦ（ｘ）ａｎｄｌｅｔＸｎ１Ｘｎ２…Ｘｎｎｂｅｔｈｅｏｒ...     

矩阵特征值的简化Brauer定理

§１　ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｔｏｐｉｃｏｆｉｎｃｌｕｓｉｏｎｒｅｇｉｏｎｓｏｆｍａｔｒｉｘｅｉｇｅｎｖａｌｕｅｓｉｓｗｏｒｔｈｙｉｎｖｅｓｔｉｇａｔｉｎｇｉｎｐｒａｃｔｉｃｅａｓｗｅｌｌａｓｉｎｔｈｅｏｒｙ．Ｆｏｒｉｎｓｔａｎｃｅ，ｉｎ［１］ａｎｄ［２］ｃｈａｐｔｅｒｓｏｎｔｈｉｓｔｏｐｉｃａｒｅｐａｒｔｉｃｕｌａｒｌｙｄｅｓｉｇｎｅｄ．ＬｅｔＡ＝（ａｉｊ）∈Ｃｎ×ｎａｎｄｒｉ＝∑ｊ≠ｉ｜ａｉｊ｜（ｉ＝１，２，．．．，ｎ）．Ｂｒａｕｅｒ＇ｓｔｈｅｏｒｅｍｐｒｏｖｉｄｅｓｅｉｇｅｎｖａｌｕ…     

Erd■s－Ginzburg－Ziv定理的一个改进

本文证明了如下结论：如果Ｇ是ｎ阶非循环的可解群，ｓ＝［１１／６ｎ］－１，则对任一由Ｇ的元ｇ１，…，ｇｓ构成的Ｓ项序列，我们均可找到ｎ个互异的下标ｉ１，…，ｉｎ使得ｇｉ１…ｇｉｎ＝１．     

On the Moments of S_ny/(nφ(n))~(1/p) in p-type Space

§１．　ＩｎｔｒｏｄｕｃｔｉｏｎＩｎ１９６７，Ｔｅｉｃｈｅｒｐｒｏｖｅｄｔｈａｔ［１］Ｅ（Ｓｕｐｎ｜Ｓｎ｜ｎＬ２ｎ）ｐ＜＋∞，　ｉｆｆＥＸ２ｌｏｇ＋｜Ｘ｜Ｌ２｜Ｘ｜＜＋∞，ｐ＝２Ｅ｜Ｘ｜ｐ＜＋∞，ｐ＞２　　　　．　Ｗｈｅｒｅ｛Ｘ，Ｘｎ，ｎ≥１｝ｉｓａｓｅｑｕｅｎｃｅｏｆｉ．ｉ．ｄｒｅａｌｒａｎｄｏｍｖａｒｉａｂｌｅｓｗｉｔｈｍｅａｎｓｚｅｒｏ．Ｉｎ１９９５，Ｔｈｅｓｉｍｉｌａｒｒｅｓｕｌｔｓｈａｖｅｂｅｅｎｓｅｔｕｐｆｏｒｉ．ｉ．ｄｒａｎｄｏｍｖａｒｉａｂｌｅｓ｛Ｘ，Ｘｎｎ≥１｝ｗｉｔｈｍｅａｎ…     

The Formula of General Term of the Sum of Equal Powers of Natural Numbers

§１．　ＩｎｔｒｏｄｕｃｔｉｏｎＴｏｆｉｎｄｔｈｅｇｅｎｅｒａｌｔｅｒｍｆｏｒｍｕｌａｏｆｃａｌｃｕｌａｔｉｎｇｗａｓａｎｏｌｄｅｓｔｐｒｏｂｌｅｍｉｎＮｕｍｂｅｒＴｈｅｏｒｙ．Ｅａｒｌｙｉｎ３００Ｂ．Ｃ．,Ａｒｃｈｉｍｅｄｏ,ｔｈｅｍａｔｈｅｍａｔｉｃｉａｎｏｆａｎｃｉｅｎｔＧｒｅｅｃｅ,ｗｏｒｋｅｄｏｕｔｔｈｅｆｏｒｍｕｌａ∑ｎｋ＝１ｋ＝ｎ（ｎ＋１）２ａｎｄ∑ｎｋ＝１ｋ２＝ｎ（ｎ＋１）（２ｎ＋１）６．Ｓｏｆａｒ,ｐｅｏｐｌｅｈａｖｅｇｏｔｍａｎｙｆｏｒｍｓｏｆｅｐｒｅｓｓｉｏｎｏｆｔｈｅｇｅ…     

α-次积分半群的Trotter-kato定理

§１．　ＩｎｔｒｏｄｕｃｔｉｏｎＷｈｅｎｗｅｉｎｔｅｇｒａｔｅｄｉｆｆｅｒｅｎｔｉａｌｅｑｕａｔｉｏｎｓ，ｗｅｃａｎｆｏｒｍｕｌａｔｅｍａｎｙｏｆｔｈｅｍａｓａｎａｂｓｔｒａｃｔＣａｕｃｈｙｐｒｏｂｌｅｍ．ＡｎａｔｕｒａｌｑｕｅｓｔｉｏｎｉｎｔｈｅｔｈｅｏｒｙｉｓｔｏｆｉｎｄｓｕｉｔａｂｌｅｃｏｎｄｉｔｉｏｎｓｕｎｄｅｒｗｈｉｃｈａｓｅｑｕｅｎｃｅｏｆａａｂｓｔｒａｃｔＣａｕｃｈｙｐｒｏｂｌｅｍ．ｕ′ｎ＝Ａｎｕｎ（ｔ），ｕｎ（０）＝ｘｎ，ｆｏｒｔ≥０，ｎ＝１，２，…ｉｎａｎａｒｂｔｉｒａｒｙＢａ…     

Angles of Norm ed Linear Spaces and Characterizations of Inner Product Spaces

§１．　Ｄｅｆｉｎｉｔｉｏｎｓ，ＬｅｍｍａｓａｎｄＴｈｅｏｒｅｍＤｅｆｉｎｉｔｉｏｎ１［１］　Ｌｅｔ（Ｘ，ｙ·ｙ）ｂｅａｒｅａｌｎｏｒｍｅｄｌｉｎｅａｒｓｐａｃｅｏｆｄｅｍｅｎｓｉｏｎｇｒｅａｔｅｒｔｈａｎ１，ｗｅｄｅｆｉｎｅａｎｇｌｅｓＡｍ，ｎ（ｘ，ｙ）ｂｅｔｗｅｅｎｎｏｎｚｅｒｏｖｅｃｔｏｒｓｘａｎｄｙｉｎＸｂｙＡｍ，ｎ（ｘ，ｙ）＝ｃｏｓ－１ｎｙｘｙｘｙ＋ｙｙｙｙｙ２－ｍｙｘｙｘｙ－ｙｙｙｙｙ２＋２（ｍ－ｎ）２（ｍ＋ｎ），ｈｅｒｅｍａｎｄｎａｒｅｔｗｏｎｏｎ－ｎｅｇｅｎｔｉｖｅｉｎｔｅ－ｇｅ…     

秩为k的有限序列t—相交族

设ｎ，ｓ１，ｓ２，…，ｓｎ为正整数及Ｍ（ｓ１，ｓ２，…，ｓｎ）＝｛（ｘ１，ｘ２，…，ｘｎ）｜０ｘｉｓｉ，且ｘｉ为正整数｝．若ＦＭ（ｓ１，ｓ２，…，ｓｎ）满足：对任何ａ，ｂ∈Ｆ，都至少有ｔ个ｉ使ａｉ∧ｂｉ＝ｍｉｎ（ａｉ，ｂｉ）＞０，则称Ｆ为Ｍ（ｓ１，ｓ２，…，ｓｎ）中的一个ｔ－相交序列族．对ｘ＝（ｘ１，ｘ２，…，ｘｎ）∈Ｍ（ｓ１，ｓ２，…，ｓｎ），称ｒ（ｘ）＝∑ｎｉ＝１ｘｉ为ｘ的秩．本文讨论并得到当ｓ１＝ｓ２＝…＝ｓｎ时Ｍ（ｓ１，ｓ２，…，ｓｎ）中秩为ｋ的有限序列最大相交族，从而获得了由Ｅｎｇｅｌ和Ｆｒａｎｋｌ提出的一个关于有限序列相交族的公开未解问题在ｋｎ＋ｔ－１情形下的解．     

最佳跳频序列族的设计与分析

本文提出了基于ｐ元广义ＧＭＷ序列和ｐ元Ｋａｓａｍｉ序列构造跳频序列族的方法,证明了基于广义ＧＭＷ序列所构造的跳频序列族具有最佳Ｈａｍｍｉｎｇ相关特性,而基于Ｋａｓａｍｉ序列所构造的跳频序列族不具有最佳Ｈａｍｍｉｎｇ相关特性。     

Identities on Bell polynomials and Sheffer sequences

In this paper, we study exponential partial Bell polynomials and Sheffer sequences. Two new characterizations of Sheffer sequences are presented, which indicate the relations between Sheffer sequences and Riordan arrays. Several general identities involving Bell polynomials and Sheffer sequences are established, which reduce to some elegant identities for associated sequences and cross sequences.     

Multivariate Sequences of Binomial Type

Using the notion of convolution of binomial sequences it is possible to show that Sheffer sequences, cross sequences, and Steffensen sequences are only mild generalizations of ordinary sequences of binomial type.     

A NEW FAMILY OF BINARY SEQUENCES WITH OPTIMAL AUTOCORRELATION VALUES AND NICE PSEUDO-RANDOM PROPERTIES

In this paper we present a series of binary sequences which is a generalization of GMW sequences constructed by Scholtz and Welch. Our sequences have optimal autocorrelation values as m -sequences, and nice pseudo-random property. The number of such sequences is counted and the linear span of such sequences is evaluated.     

On the pseudorandomness of binary and quaternary sequences linked by the gray mapping

Binary and quaternary sequences are the most important sequences in view of many practical applications. Any quaternary sequence can be decomposed into two binary sequences and any two binary sequences can be combined into a quaternary sequence using the Gray mapping. We analyze the relation between the measures of pseudorandomness for the two binary sequences and the measures for the corresponding quaternary sequences, which were both introduced by Mauduit and Sárközy. Our results show that each ‘pseudorandom’ quaternary sequence corresponds to two ‘pseudorandom’ binary sequences which are ‘uncorrelated’.     

Ordering sequences by permutation transducers

To extend a natural concept of equivalence of sequences to two-sided infinite sequences, the notion of permutation transducer is introduced. Requiring the underlying automaton to be deterministic in two directions, it provides the means to rewrite bi-infinite sequences. The first steps in studying the ensuing hierarchy of equivalence classes of bi-infinite sequences are taken, by describing the classes of ultimately periodic two-sided infinite sequences. It is important to make a distinction between unpointed and pointed sequences, that is, whether or not sequences are considered equivalent up to shifts. While one-sided ultimately periodic sequences form a single equivalence class under ordinary transductions, which is shown to split into two under permutation transductions, in the two-sided case there are three unpointed and seven pointed equivalence classes under permutation transduction.     

On Discrete Limits of Sequences of Approximately Continuous Functions and tae-Continuous Functions

We show that the classes of all discrete limits of sequences of ap- proximately continuous functions, of all discrete limits of sequences of derivatives and of all discrete limits of sequences of Baire 1 functions are the same. We describe also the discrete limits of sequences of quasicontinuous functions, and of sequences of almost everywhere continuous functions, and we present anec- essary condition which must be satisfied by the discrete limits of sequences of T_ae -continuous functions.     

Similarity analysis of DNA sequences based on the EMD method

DNA sequences can be translated into 2D graphs and into numerical sequences; we call the numerical sequences nonlinear signal sequences. We can use the empirical mode decomposition (EMD) method to divide nonlinear signal sequences into a group of well-behaved intrinsic mode functions (IMFs) and a residue, so that we can compare the similarities among DNA sequences conveniently and intuitively. This work tests the method’s suitability by using the mitochondria of four different species.     

Catalan-like number sequences and Hausdorff moment sequences

Many well-known Catalan-like sequences turn out to be Stieltjes moment sequences (Liang et al. (2016)). However, a Stieltjes moment sequence is in general not determinate; Liang et al. suggested a further analysis about whether these moment sequences are determinate and how to obtain the associated measures. In this paper we find necessary conditions for a Catalan-like sequence to be a Hausdorff moment sequence. As a consequence, we will see that many well-known counting coefficients, including the Catalan numbers, the Motzkin numbers, the central binomial coefficients, the central Delannoy numbers, are Hausdorff moment sequences. We can also identify the smallest interval including the support of the unique representing measure. Since Hausdorff moment sequences are determinate and a representing measure for above mentioned sequences are already known, we could almost complete the analysis raised by Liang et al. In addition, subsequences of Catalan-like number sequences are also considered; we will see a necessary and sufficient condition for subsequences of Stieltjes Catalan-like number sequences to be Stieltjes Catalan-like number sequences. We will also study a representing measure for a linear combination of consecutive terms in Catalan-like number sequences.