Báo cáo toán học: "Enumeration of alternating sign matrices of even size (quasi-)invariant under a quarter-turn rotation" pot

... for citation purposes) Health and Quality of Life Outcomes Open Access Research The visual analog rating scale of health-related quality of life: an examination of end-digit preferences Amir Shmueli* Address: ... suggested by the data. Nevertheless, what can be the interpretation of these values? Two explanations can be offered. First, in Israel, as in ma...

Ngày tải lên: 20/06/2014, 15:20

... above, share a common structure on the joint distributions of their (nonzero) eigenvalues. Based on the common structure, we then derive the marginal distributions of the ordered eigenvalues, using ... marginal distribution of each ordered eigenvalue. 3. Marginal Distributions of Ordered Eigenvalues 3.1. General Expression for the Marginal Distrib...

Ngày tải lên: 21/06/2014, 16:20

... Stress Field in an Elastic Strip in Frictionless Contact with a Rigid Stamp 475 2. D. D. Ang, Stabilized aproximate solution of certain integral equations of first kind arizing in mixed ... 469–475 StressFieldinanElasticStripin Frictionless Contact with a Rigid Stamp * Dang Dinh Ang Institute of Applie d Mechanics 291 Dien Bien Phu Str., 3 Distr., Ho Chi Min...

Ngày tải lên: 06/08/2014, 05:20

... Aztec diamond of order 3. We are interested in tilings of hexagons with lozenges, which are rhombi with unit sides and angles of 120 and 60 degrees, and tilings of Aztec diamonds with dominoes, which ... number of tilings of half of a hexagon or half of a diamond, with dents at given places. This is not new: see [7] and [8]. 2. Express the number of...

Ngày tải lên: 07/08/2014, 06:20

... distribu- tions of the number of edges in a random dissection and in a random outerplanar graph, respectively. Proof of Theorem 1.4. The limit distribution of the number of edges in a two-connected unlabeled ... the unique embedding of two-connected components of outerplanar the electronic journal of combinatorics 14 (2007), #R66 21 Enumeration and asymptotic pro...

Ngày tải lên: 07/08/2014, 15:23

... n ∈ P and k ∈ [n−1, (n−1) 2 ]. 8. Higher Spin Alternating Sign Matrices of Size 3 In the previous section, the enumeration of higher spin alternating sign matrices was studied using a general, ... 27 alternating sign matrices and such osculating paths is also considered in [14, Sec. 5], [15, Sec. 2], [31, Sec. 9] and [66, Sec. IV]. 5. Further Representations of Higher Spin...

Ngày tải lên: 07/08/2014, 15:23

... interpretation. This interpretation is in line with the rest of this art icle, counting permutations having an initial descending segment and λ-coloured fixed points to the right of the initial segment. In addition, ... n, generalising the results with λ = 0 from [9]. In our proofs, we will use the following convent io ns. If λ is a positive integer, and (π,C) is a permutation w...

Ngày tải lên: 07/08/2014, 21:21

... exactly, esp ecial to lattices(maybe infinite), such as the quadratic lattice, hexagonal lattice, triangular lattice, kagome lattice and etc[3,7,13,22]. For graph on to r us, D. J. Klein[9] had ... Enumeration of perfect matchings of a type of quadratic lattice on the torus ∗ Fuliang Lu Lianzhu Zhang † Fenggen Lin School of Mathematical Sciences, Xiamen Unive...

Ngày tải lên: 08/08/2014, 12:22

... journal of combinatorics 17 (2010), #R51 13 Enumeration of alternating sign matrices of even size (quasi-)invariant under a quarter-turn rotation Jean-Christophe Aval, Philippe Duchon ∗ LaBRI, ... Subject Classification: 0 5A1 5, 0 5A9 9 Abstract The aim of this work is to enumerate alternating sign matrices (ASM) that are quasi-invariant under a quarter...

Ngày tải lên: 08/08/2014, 12:22

... (11) 3 Enumeration of m-tuples of Permutations More generally, we may consider the m-tuples of permutations of S n with exactly k occurrences of “ R m ”. Denote by D(n, k) the number of such multiple ... electronic journal of combinatorics 17 (2010), #R131 6 Enumeration of Restricted Permutation Triples Xiaojing Chen School of Mathematics and Computational Science China...

Ngày tải lên: 08/08/2014, 12:22

... conversely). This gives 2 n+2 strict pin words of size n and concludes the proof. The proof of Theorem 4.1 2 follows the structure of the proof of Theorem 3.4 in [16]. Lemma 4.11. [16, Lemma ... oscillation ξ of size n − 1 by the addition of either a minim al element at the beginning of ξ or a maximal element at the e nd of ξ, followed by a flip of an element of ξ according...

Ngày tải lên: 08/08/2014, 14:22

... colorings and nowhere-zero flows, the second one uses an interpretation of a nowhere-zero point of a certain incidence matrix as a nowhere-zero coloring” of the underlying graph. Part I Berlekamp’s ... Orientations of Graphs. Combinatorica 12 (1992), 125–134. [AlTa2] N. Alon, M. Tarsi: A Nowhere-zero Point in Linear Mappings. Combin atorica 9 (1989), 393–395. the electron...

Ngày tải lên: 08/08/2014, 14:22

... ies of the hypergroups defined by J.C. Varlet [24] and S. Comer [3] that called here Varlet hypergroups and Comer hypergroups, respectively. Using the results of [1, 22] the electronic journal of ... determined by lattices introduced by Varlet and Comer, especially we enumerate Varlet and C omer hypergroups of orders less than 50 and 13, respectively. 1 Basic defi...

Ngày tải lên: 08/08/2014, 14:23

... shapes. the electronic journal of combinatorics 18(2) (2011), #P20 13 Enumeration of standard Young tableaux of certain truncated shapes Ron M. Adin ∗ Department of Mathematics Bar-Ilan University Ramat-Gan ... computations were carried out for the number of standard Young tableaux of these and other truncated shapes. It was found t hat , in certain distingu...

Ngày tải lên: 08/08/2014, 14:23

... 111:1779-1782. doi:10.1186/1477-7525-9-48 Cite this article as: Baumann et al.: General and disease-specific quality of life in patients with chronic suppurative otitis media - a prospective study. Health and Quality of Life Outcomes ... 9:48 http://www.hqlo.com/content/9/1/48 Page 2 of 6 RESEARC H Open Access General and disease-specific qualit...

Ngày tải lên: 12/08/2014, 01:22