4 search results - page 1 / 1 » Grad and classes with bounded expansion III. Restricted grap... |
EJC
2008
13 years 7 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
13 years 2 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 7 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
14 years 1 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...