4 search results - page 1 / 1 » Grad and classes with bounded expansion III. Restricted grap... |
EJC
2008
13 years 4 months ago
2008
We study restricted homomorphism dualities in the context of classes with bounded expansion. This presents a generalization of restricted dualities obtained earlier for bounded deg...
JSYML
2010
12 years 11 months ago
2010
A set A of vertices of a graph G is called d-scattered in G if no two d-neighborhoods of (distinct) vertices of A intersect. In other words, A is d-scattered if no two distinct ver...
STOC
2006
ACM
14 years 4 months ago
2006
ACM
Classes of graphs with bounded expansion have been introduced in [15], [12]. They generalize both proper minor closed classes and classes with bounded degree. For any class with b...
MFCS
2007
Springer
13 years 10 months ago
2007
Springer
We show that every NP problem is polynomially equivalent to a simple combinatorial problem: the membership problem for a special class of digraphs. These classes are defined by me...