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IANDC
2006
113views more  IANDC 2006»
13 years 7 months ago
Automata and fixed point logic: A coalgebraic perspective
This paper generalizes existing connections between automata and logic to a coalgestraction level. Let F : Set Set be a standard functor that preserves weak pullbacks. We introdu...
Yde Venema
COMPGEOM
2003
ACM
14 years 18 days ago
Loops in reeb graphs of 2-manifolds
Given a Morse function over a 2-manifold with or without boundary, the Reeb graph is obtained by contracting the connected components of the level sets to points. We prove tight u...
Kree Cole-McLaughlin, Herbert Edelsbrunner, John H...
SIAMCOMP
2002
113views more  SIAMCOMP 2002»
13 years 7 months ago
Fast Greedy Algorithms for Constructing Sparse Geometric Spanners
Given a set V of n points in Rd and a real constant t > 1, we present the first O(n log n)-time algorithm to compute a geometric t-spanner on V . A geometric t-spanner on V is a...
Joachim Gudmundsson, Christos Levcopoulos, Giri Na...
WG
2010
Springer
13 years 5 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...
DAC
1997
ACM
13 years 11 months ago
More Practical Bounded-Skew Clock Routing
: Academic clock routing research results has often had limited impact on industry practice, since such practical considerations as hierarchical buffering, rise-time and overshoot ...
Andrew B. Kahng, Chung-Wen Albert Tsao