Topological Structure of Non-wandering Set of a Graph Map

Let G be a graph （i.e., a finite one-dimensional polyhedron） and f ： G → G be a continuous map. In this paper, we show that every isolated recurrent point of f is an isolated non-wandering point; every accumulation point of the set of non-wandering points of f with infinite orbit is a two-order accumulation point of the set of recurrent points of f; the derived set of an ω-limit set of f is equal to the derived set of an the set of recurrent points of f; and the two-order derived set of non-wandering set of f is equal to the two-order derived set of the set of recurrent points of f.     

What is the linear approximation?(1)

If a function f(x) is differentiable,then the linear approximation of f(x) at a is f(x)≈f(a)+f′(a)(x-a),while the value of x close to a.The equation L(x)=f(a)+f′(a)(x-a) is called the linearization of f(x) at a.     

Algorithms for computing the global infimum and minimum of a polynomial function

By catching the so-called strictly critical points,this paper presents an effective algorithm for computing the global infimum of a polynomial function.For a multivariate real polynomial f ,the algorithm in this paper is able to decide whether or not the global infimum of f is finite.In the case of f having a finite infimum,the global infimum of f can be accurately coded in the Interval Representation.Another usage of our algorithm to decide whether or not the infimum of f is attained when the global infimum of f is finite.In the design of our algorithm,Wu’s well-known method plays an important role.     

ON THE NON-COMPACTNESS OF THE CORE OF NONATOMIC CONVEX σ-CONTINUOUS MEASURE GAMES

This paper concerns with the core of nonatomic gaxaes of foma f(μ), where μ is a nonatomic nonnegative measure and f is a continuous convex function on the domaln of μ. The main result of this paper is that the core of the game is not compact under the norm topology unless the game itself is a measure. This shows the largeness of the core in a sense other than that defined by Sharky for finite cases.     

Rigidity of subfamilies of hypersurfaces in ℙ n with maximal length of Griffiths-Yukawa coupling

Let f:X→U be a family of smooth hypersurfaces in P nof degree d>n+1 over a smooth curve U.Assume that the Griffiths-Yukawa coupling of f is non-vanishing.Then f is rigid.Moreover,we generalize it to the case when the Griffiths-Yukawa coupling of f is degenerated.     

Rigidity of subfamilies of hypersurfaces in P~n with maximal length of Griffiths-Yukawa coupling

Let f:X→U be a family of smooth hypersurfaces in P nof degree dn+1 over a smooth curve U.Assume that the Griffiths-Yukawa coupling of f is non-vanishing.Then f is rigid.Moreover,we generalize it to the case when the Griffiths-Yukawa coupling of f is degenerated.     

Metrically regular mappings and its application to convergence analysis of a confined Newton-type method for nonsmooth generalized equations

Notion of metrically regular property and certain types of point-based approximations are used for solving the nonsmooth generalized equation f(x)+F(x)?0,where X and Y are Banach spaces,and U is an open subset of X,f:U→Y is a nonsmooth function and F:X■Y is a set-valued mapping with closed graph.We introduce a confined Newton-type method for solving the above nonsmooth generalized equation and analyze the semilocal and local convergence of this method.Specifically,under the point-based approximation of f on U and metrically regular property of f+F,we present quadratic rate of convergence of this method.Furthermore,superlinear rate of convergence of this method is provided under the conditions that f admits p-point-based approximation on U and f+F is metrically regular.An example of nonsmooth functions that have p-point-based approximation is given.Moreover,a numerical experiment is given which illustrates the theoretical result.     

Nielsen Theory on 3-manifolds Covered by S~2× R

Let f : M → M be a self-map of a closed manifold M of dimension dim M ≥ 3. The Nielsen number N(f) of f is equal to the minimal number of fixed points of f among all self-maps f in the homotopy class of f. In this paper, we determine N(f) for all self-maps f when M is a closed3-manifold with S2× R geometry. The calculation of N(f) relies on the induced homomorphisms of f on the fundamental group and on the second homotopy group of M.     

树映射的链回归点与拓扑熵

Let f be a tree map,P(f) the set of periodic points of f and CR(f) the set of chain recurrent points of f. In this paper,the notion of division for invariant closed subsets of a tree map is introduced. It is proved that: (1) fhas zero topological entropy if and only if for any x∈CR(f)-P(f) and each natural number s the orbit of x under f^5 has a division; (2) If f has zero topological entropy,then for any xECR(f)--P(f) the w-limit set of x is an infinite minimal set.     

All good (bad) words consisting of 5 blocks

Generalized Fibonacci cube Q_d(f), introduced by Ilic, Klavzar and Rho, is the graph obtained from the hypercube Q_d by removing all vertices that contain f as factor. A word f is good if Q_d(f) is an isometric subgraph of Q_d for all d ≥ 1, and bad otherwise. A non-extendable sequence of contiguous equal digits in a word μ is called a block of μ. Ilic, Klavzar and Rho shown that all the words consisting of one block are good, and all the words consisting of three blocks are bad. So a natural problem is to study the words consisting of other odd number of blocks. In the present paper,a necessary condition for a word consisting of odd number of blocks being good is given, and all the good(bad) words consisting of 5 blocks is determined.     

强预不变凸函数的充要条件

本文讨论了强预不变凸函数与预不变凸函数、严格预不变凸函数及半严格预不变凸函数之间的关系,得到它的三个充要条件：(i)在一定条件下,f是强预不变凸函数的充分必要条件是f是预不变凸函数且f满足中间点强预不变凸性；(ii)在一定条件下,f是强预不变凸函数的充分必要条件是f是严格预不变凸函数且f满足中间点强预不变凸性；(iii)在一定条件下,f是强预不变凸函数的充分必要条件是f是半严格预不变凸函数且f满足中间点强预不变凸性．     

强预拟不变凸函数的充要条件

本文引入了一类新的广义凸函数—强预拟不变凸函数.讨论了强预拟不变凸函数与预拟不变凸函数、严格预拟不变凸函数及半严格预拟不变凸函数之间的关系,得到它的三个充要条件:(i)当条件P_1满足时,f是强预拟不变凸函数的充分必要条件是f是预拟不变凸函数且f满足中间点强预拟不变凸性;(ii)当条件P_2满足时,f是强预拟不变凸函数的充分必要条件是f是严格预拟不变凸函数且f满足中间点强顶拟不变凸性;(iii)当条件P_2满足时,f是强预拟不变凸函数的充分必要条件是f是半严格预拟不变凸函数且f满足中间点强预拟不变凸性.     

Fengenbaum映射的搓揉序列与特征集

设f为Feigenbaum映射,亦即函数方程fp(λx)=λf(x)满足一定条件的单峰解．f的搓揉序列为0-1无限序列,f的特征集是临界点轨迹的闭包．本文研究f的性质进而证明．f的搓揉序列是某代换在符号空间中的不动点,f在特征集上的限制是某代换子移位的一个因子．     

Nielsen theory on 3-manifolds covered by S 2 × ℝ

Let f: M → M be a self-map of a closed manifold M of dimension dim M ≥ 3. The Nielsen number N(f) of f is equal to the minimal number of fixed points of f among all self-maps f in the homotopy class of f. In this paper, we determine N(f) for all self-maps f when M is a closed 3-manifold with S²×R geometry. The calculation of N(f) relies on the induced homomorphisms of f on the fundamental group and on the second homotopy group of M.     

涉及微分多项式的亚纯函数的增长性

本文讨论了具有亏值的超越亚纯函数的增长性,证明了如下定理：设有下级为有穷的超越亚纯函数ｆ（ｚ）具有一亏值（有穷或否）,（ｚ）＝ｆｎＱ［ｆ］＋ Ｐ［ｆ］为ｆ（ｚ）的微分多项式,其中Ｑ［ｆ］（≠０）与Ｐ［ｆ］（≠０）的各项系数均为级不超过的亚纯函数,且 Ｐ［ｆ］的权 ．又△（θｊ）（ｊ＝ １;２;…;ｑ; θｑ+1＝θ1+2π）为条从原点出发的半直线;且对有：其中为不依赖于的非负常数,则必有ｆ｛ｚ｝的级ｍａｘ,其中     

两类微分多项式的Picard例外值

设ｆ（ｚ）为平面内非常数亚纯函数，本文考虑了形如ｆ￣ｎＱ［ｆ］为正整数，Ｑ［ｆ］为ｆ的线性齐次微分多项式或ｆ′的多项式）的微分多项式的值分布。推广了Ｗ．Ｋ．Ｈａｖｍａｎ￣［１］和Ｅ．Ｍｕｅｓ￣［４］的结果。     

关于图的(g,f)-因子分解

设G是一个图,g和f是定义在图G的顶点集V(G)上的两个非负整数值函数且g＜f.图G的一个(g,f)-因子是G的一个支撑子图F,使对所有的x∈V(G)有g(x)≤d_F(x)≤f(x).若G本身是一个(g,f)-因子,则称G是一个(g,f)-图.若G的边能分解成一些边不交的(g,f)-因子,则称G是(g,f)-因子可分解的.本文给出图G是(g,f)-因子可分解的一个充分条件.     

THE ASYMPTOTIC PERIODICITY OF PIECEWISE MONOTONE SELFMAPS OF THE INTERVAL

Let f : I → I be a piecewise monotone interval map. The critical point set C(f) of f consists of all the preimages of its turning points. It is proved that the complex dynamical behaviors of f are all concentrated on the derived set of C(f). f is asymptotically periodic if and only if the derived set of C(f) is countable.     

凸函数的双参数平均不等式的新证明

利用 Tchebycheff积分不等式和积分形式的 Cauchy中值定理证明了下列结论 :设 f(x)是 [a,b]上的正连续函数 ,且在 (a,b)内可微 ,若 f′(x)单调递增 ,则对任意的 p,q,有 Mp,q(f) 相似文献   

赋予hit—or-miss拓扑超空间动力系统的拓扑熵

设（X,d,f）为拓扑动力系统,其中X为局部紧第二可数Hausdorff空间,d为紧型度量,f为完备映射,用2^x和f分别表示由X的所有非空闭子集和所有闭子集构成的集族,（2^x,ρ,2^f）和（f,ρ,2^f）为由（X,d,f）诱导的赋予hit—or—miss拓扑的超空间动力系统．本文研究了h（X,d,f）和h（2^...