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WG
2010
Springer
13 years 8 months ago
Graphs with Large Obstacle Numbers
Motivated by questions in computer vision and sensor networks, Alpert et al. [3] introduced the following definitions. Given a graph G, an obstacle representation of G is a set of...
Padmini Mukkamala, János Pach, Deniz Sari&o...
JCO
2011
113views more  JCO 2011»
13 years 5 months ago
Hardness and algorithms for rainbow connection
An edge-colored graph G is rainbow connected if any two vertices are connected by a path whose edges have distinct colors. The rainbow connection of a connected graph G, denoted r...
Sourav Chakraborty, Eldar Fischer, Arie Matsliah, ...
STOC
1990
ACM
135views Algorithms» more  STOC 1990»
14 years 2 months ago
A Separator Theorem for Graphs with an Excluded Minor and its Applications
ions (Extended Abstract) Noga Alon Paul Seymour Robin Thomas Let G be an n-vertex graph with nonnegative weights whose sum is 1 assigned to its vertices, and with no minor isomorp...
Noga Alon, Paul D. Seymour, Robin Thomas
JSYML
2007
66views more  JSYML 2007»
13 years 10 months ago
Spectra of structures and relations
We consider embeddings of structures which preserve spectra: if g : M → S with S computable, then M should have the same Turing degree spectrum (as a structure) that g(M) has (a...
Valentina S. Harizanov, Russel G. Miller
ICPR
2006
IEEE
14 years 11 months ago
Patterns of Co-Linear Equidistant Letter Sequences and Verses
It has been shown ([4], [3]) that equidistant letter sequence (ELS) pairs in the book of Genesis (G) form more compact geometric patterns on the surface of a cylinder than is expe...
Nachum Bombach, Harold Gans