Sciweavers

EJC
2008
13 years 4 months ago
Explicit constructions of loops with commuting inner mappings
In 2004, Cs
Ales Drápal, Petr Vojtechovský
EJC
2008
13 years 4 months ago
On triangle-free distance-regular graphs with an eigenvalue multiplicity equal to the valency
Let be a triangle-free distance-regular graph with diameter d 3, valency k 3 and intersection number a2 = 0. Assume has an eigenvalue with multiplicity k. We show that if for ...
Kris Coolsaet, Aleksandar Jurisic, Jack H. Koolen
EJC
2008
13 years 4 months ago
Grad and classes with bounded expansion I. Decompositions
Abstract. We introduce classes of graphs with bounded expansion as a generalization of both proper minor closed classes and degree bounded classes. Such classes are based on a new ...
Jaroslav Nesetril, Patrice Ossona de Mendez
EJC
2008
13 years 4 months ago
On two-path convexity in multipartite tournaments
Darren B. Parker, Randy F. Westhoff, Marty J. Wolf
EJC
2008
13 years 4 months ago
Pooling spaces associated with finite geometry
3 Motivated by the works of Ngo and Du [H. Ngo, D. Du, A survey on combinatorial group testing 4 algorithms with applications to DNA library screening, DIMACS Series in Discrete Ma...
Tayuan Huang, Kaishun Wang, Chih-wen Weng
EJC
2008
13 years 4 months ago
Pattern classes of permutations via bijections between linearly ordered sets
Abstract. A pattern class is a set of permutations closed under pattern involvement or, equivalently, defined by certain subsequence avoidance conditions. Any pattern class X which...
Sophie Huczynska, Nikola Ruskuc
EJC
2008
13 years 4 months ago
The Ramsey numbers for stars of even order versus a wheel of order nine
For two given graphs G1 and G2, the Ramsey number R(G1, G2) is the smallest positive integer n such that for any graph G of order n, either G contains G1 or the complement of G co...
Yunqing Zhang, Yaojun Chen, Kemin Zhang
EJC
2008
13 years 4 months ago
Factorization formulas for MacDonald polynomials
The aim of this note is to give some factorisation formulas for different versions of the Macdonald polynomials when the parameter t is specialized at roots of unity, generalizing...
François Descouens, Hideaki Morita
EJC
2008
13 years 4 months ago
On an involution of Christoffel words and Sturmian morphisms
Valérie Berthé, Aldo de Luca, Christ...