DM
2010
13 years 3 months ago
2010
DM
2008
13 years 4 months ago
2008
Using results by McKee and Woodall on binary matroids, we prove that the set of postman sets has odd cardinality, generalizing a result by Toida on the cardinality of cycles in Eu...
DM
2008
13 years 4 months ago
2008
A graph G is hamiltonian-connected if any two of its vertices are connected by a Hamilton path (a path including every vertex of G); and G is s-hamiltonian-connected if the deleti...
DM
2008
13 years 4 months ago
2008
For two or more classes of points in Rd with d 1, the class cover catch digraphs (CCCDs) can be constructed using the relative positions of the points from one class with respect...
DM
2008
13 years 4 months ago
2008
DM
2008
13 years 4 months ago
2008
DM
2008
13 years 4 months ago
2008
DM
2008
13 years 4 months ago
2008
We study graph colorings avoiding periodic sequences with large number of blocks on paths. The main problem is to decide, for a given class of graphs F, if there are absolute const...
DM
2008
13 years 4 months ago
2008
This paper studies the cycle indices of products of permutation groups. The main focus is on the product action of the direct product of permutation groups. The number of orbits o...
DM
2008
13 years 4 months ago
2008