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WG
2010
Springer
15 years 4 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»
15 years 1 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»
15 years 10 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»
15 years 6 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
16 years 7 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