Báo cáo toán học: " A criterion for unimodality" docx

... Math., to appear. [2] BRENTI, F.: Log-concave and unimodal sequences in Algebra, Combinatorics and Geometry: an update. Contemporary Mathematics, 178, 71-84, 1994. [3] STANLEY, R.: Log-concave and ... R.: Log-concave and unimodal sequences in algebra, combinatorics and geometry. Graph theory and its applications: East and West (Jinan, 1986), 500-535, Ann. New York Acad. Sci., 576,NewYork,1989...

Ngày tải lên: 07/08/2014, 06:20

... 3-17. [RA1] C. C. Rousseau and F. Ali, “On a conjecture concerning graphical partitions,” preprint, April 1994. [RA2] C. C. Rousseau and F. Ali, A note on graphical partitions,” preprint, April 1994. [SH] ... antiranks of α satisfy an s-variant of the Nash-Williams conditions: s + j  i=1 r i (α) ≥ j. A Recurrence for Counting Graphical Partitions Tiffany M. Barnes ∗ Carla D. Savage † D...

Ngày tải lên: 07/08/2014, 06:20

... the lattice (C, ⊆). A β INVARIANT FOR GREEDOIDS AND ANTIMATROIDS GARY GORDON Department of Mathematics Lafayette College Easton, PA 18042 gordong@lafayette.edu Submitted: November 12, 1996; Accepted: ... Accepted: March 28, 1997. Abstract. We extend Crapo’s β invariant from matroids to greedoids, con- centrating especially on antimatroids. Several familiar expansions for β(G) have greed...

Ngày tải lên: 07/08/2014, 06:20

... we can make an approximation of L ≈ .22001865 with an error of less than 1.5 ·10 −7 . Inequality (10) can certainly be used to obtain more precise approximations of L. the electronic journal of ... divide the argument into cases based on the dimension of v and the sequence of ρ i ’s. This argument is inductive; for all cases after Case 1 we are assuming that no smooth vector of smaller dime...

Ngày tải lên: 07/08/2014, 06:22

... (2007), #N11 3 A Bound for Size Ramsey Numbers of Multi-partite Graphs Yuqin Sun and Yusheng Li ∗ Department of Mathematics, Tongji University Shanghai 200092, P. R. China xxteachersyq@163.com, ... Erd˝os, R. Faudree, C. Rousseau and R. Schelp, The size Ramsey numbers, Period. Math. Hungar. 9 (1978) 145–161. [3] P. Erd˝os and C. Rousseau, The size Ramsey number of a complete bipartite g...

Ngày tải lên: 07/08/2014, 13:21

... regularity concept that has been introduced by Kohayakawa and R¨odl [7]. Following Kohayakawa and R¨odl, we say that a bipartite graph G = (A B, E) with density p = |E|/( |A| |B|) is (ε)-regular if ... for ε-regularity, that one can find in time n O(1/p) a partition guaranteed by the version of Szemer´edi’s lemma for sparse graphs that was introduced by Kohayakawa and R¨odl [7]. Note...

Ngày tải lên: 07/08/2014, 15:22

... in this paragraph will be made precise in the following paragraphs. The parameters t g and p g arise in the univariate asymptotic enumeration of a variety of maps on surfaces and the parameters ... journal of combinatorics 17 (2010), #R155 4 A formula for the bivariate map asymptotics constants in terms of the univariate map asymptotics constants Zhicheng Gao ∗ School of Mathematics and...

Ngày tải lên: 08/08/2014, 12:23

... exists u ∈ A such that (u, v) ∈ E. Note that in a tournament it is always the case that A → B or B → A. If A = {a} and A → B we write a → B, and vice versa. For a linear order L on a set of vertices, ... If {a 1 , . . . , a m } does not dominate B, that means by the definition of (t, m)-ABMT’s that there is an element b ∈ B that does not have a greater index than a i...

Ngày tải lên: 08/08/2014, 14:23

... virtual infrastructure, which acts as a rendezvous area for storing 8 drawback of this approach is the hot spot problem b ecause all data reports and queries for the same meta-data are concentrated ... region for the queries and the generated data. Therefore, it enables the gathering of all of the generated data in the network and permits the performing of certain data optimizations (...

Ngày tải lên: 20/06/2014, 20:20

... this article is to study and establish the ASCLT for self-normalized partial sums of random variables in the domain of attraction of the normal law, we will show that the ASCLT holds under a fairly ... 1029-242X Article type Research Submission date 4 August 2011 Acceptance date 20 January 2012 Publication date 20 January 2012 Article URL http://www.journalofinequalitiesandapplications.co...

Ngày tải lên: 20/06/2014, 21:20