Báo cáo toán hoc:" Some Results on Chromatic Polynomials of Hypergraphs" pdf

... formulae of chromatic polynomials of non-uniform hypergraphs were men- tioned by Allagan [2]. He considered the special case of non-uniform elementary cycles H m which are constructed from an m-gon, ... L. Teo, Chromatic polynomials and chromaticity of graphs. Singapore: World Scientific Publishing. xxvii, 2005. [9] B. Eisenberg, Characterization of a polygonal graph by means...

Ngày tải lên: 08/08/2014, 01:20

... addition, w e will use the notations l(f) to denote the exponent of convergence of zero sequences of meromorphic function f(z); s(f) to denote the order of f (z). We say that meromorphic functions ... Equations 2012, 2012:1 http://www.advancesindifferenceequations.com/content/2012/1/1 Page 6 of 8 for some constant τ. Here, we also study the shift analo gue of Br ück conjecture,...

Ngày tải lên: 20/06/2014, 21:20

Ngày tải lên: 05/08/2014, 09:46

Ngày tải lên: 05/08/2014, 10:20

... y)= x, p 2 (x, y)=y are the canonical projections. By the Proposition 3.2 the second Some Re sults on the Properties D 3 (f) and D 4 (f) 147 8. D.Vogt , On two clases of (F )-spaces,Arch. M ath. ... 2006 Abstract. The aim of this paper is to give characterizations of subspaces and quo- tients of  ∞ (I)  ⊗ Π L f (α, ∞) and  1 (I)  ⊗ Π L f (α, ∞)-spaces which are an extension...

Ngày tải lên: 06/08/2014, 05:20

... (see [11]). In this paper we give some results of type of Shcherbina on the relation between pluriporlarity of graphs and holomorphicity of complex-valued functions defined on a domain in C n . In particular ... section is devoted to present holomorphic graphs of Hartogs type. The fourth one deals with holomorphic graphs of Forelli type. 2. Basic Definitions In this section...

Ngày tải lên: 06/08/2014, 05:20

... proved some results on mid-point sets of two linear sets in the light of the Lebesgue density. In the present paper the authors restrict their investigations into mid-point sets of sets of natural ... the mid-point of any two numbers of A belonging to sequence (1) is different from r, we can assert that at least one of p + i and q − i does not belong to A if |i| satisfies co...

Ngày tải lên: 06/08/2014, 05:20

... span a diagonal lies on one of the lines of symmetry of the [4, 2t] 1 configuration, which has the symmetries of a regular m-gon. For the chosen point of intersection to lie on a line of symmetry, ... 4] 1 configuration of size m consists of two concentric m-gons corresponding to the two symmetry classes of points. It is denoted as m#a b c d ,wherea and c are the spans of...

Ngày tải lên: 07/08/2014, 13:21

... fundamental results and the standard notations of the Nevanlinna theory (e.g., see [1-3]). In addition, w e will use the notations l(f) to denote the exponent of convergence of zero sequences of meromorphic ... established a version of Nevanlinna theory based on difference operators. Ishizaki and Yanagihara [6] developed a version of Wiman-Valiron theory for difference equatio...

Ngày tải lên: 21/06/2014, 17:20

... that the condition sup{ω(g)ω(g −1 ):g ∈ G} < ∞ implies the condition (1.1). 2. Main Results Our aim in this section is to answer negatively the question 1.4 by producing an example of a group ... authors consider the sufficient condition ω(n)ω(−n)=o(n) for weak amenability of Beurling algebras on the integers. In this paper we show that this characterization does not generalize to no...

Ngày tải lên: 06/08/2014, 05:20