751 search results - page 46 / 151 » The Distinguishing Chromatic Number |
ICALP
2010
Springer
15 years 1 months ago
2010
Springer
Abstract. Given a family of subsets of an n-element universe, the kcover problem asks whether there are k sets in the family whose union contains the universe; in the k-packing pro...
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COCOON
2008
Springer
15 years 28 days ago
2008
Springer
In this paper, we consider a new visual cryptography scheme that allows for sharing of multiple secret images on graphs: we are given an arbitrary graph (V, E) where every node an...
JGT
2008
14 years 11 months ago
2008
The square G2 of a graph G is the graph with the same vertex set as G and with two vertices adjacent if their distance in G is at most 2. Thomassen showed that for a planar graph ...
JGAA
2007
14 years 11 months ago
2007
Let S be a set of horizontal line segments, or bars, in the plane. We say that G is a bar visibility graph, and S its bar visibility representation, if there exists a one-to-one c...
JGT
2007
14 years 11 months ago
2007
We introduce and study backbone colorings, a variation on classical vertex colorings: Given a graph G = (V, E) and a spanning subgraph H of G (the backbone of G), a backbone color...