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» On Bounded Queries and Approximation
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CASC
2009
Springer
157views Mathematics» more  CASC 2009»
15 years 4 months ago
On the Complexity of Reliable Root Approximation
This work addresses the problem of computing a certified ǫ-approximation of all real roots of a square-free integer polynomial. We proof an upper bound for its bit complexity, b...
Michael Kerber
WAOA
2007
Springer
170views Algorithms» more  WAOA 2007»
15 years 4 months ago
A 5/3-Approximation for Finding Spanning Trees with Many Leaves in Cubic Graphs
For a connected graph G, let L(G) denote the maximum number of leaves in a spanning tree in G. The problem of computing L(G) is known to be NP-hard even for cubic graphs. We improv...
José R. Correa, Cristina G. Fernandes, Mart...
AUTOMATICA
2006
73views more  AUTOMATICA 2006»
14 years 10 months ago
Robust MPC of constrained discrete-time nonlinear systems based on approximated reachable sets
A robust MPC for constrained nonlinear systems with uncertainties is presented. Outer bounds of the reachable sets of the system are used to predict the evolution of the system un...
J. M. Bravo, T. Alamo, Eduardo F. Camacho
CAD
2006
Springer
14 years 10 months ago
An example on approximation by fat arcs and fat biarcs
Fat arcs form bounding boxes for planar curves. An example on approximation by fat arcs, provided by Qun and Rokne, is corrected. The third derivative of the given curve segment u...
Jun-Hai Yong, Xiao Chen, Jean-Claude Paul
SIGMOD
2009
ACM
155views Database» more  SIGMOD 2009»
15 years 10 months ago
Efficient top-k algorithms for fuzzy search in string collections
An approximate search query on a collection of strings finds those strings in the collection that are similar to a given query string, where similarity is defined using a given si...
Rares Vernica, Chen Li