141 search results - page 6 / 29 » Approximating Steiner trees in graphs with restricted weight... |
STOC
2010
ACM
14 years 15 days ago
2010
ACM
We give the first polynomial-time approximation scheme (PTAS) for the Steiner forest problem on planar graphs and, more generally, on graphs of bounded genus. As a first step, w...
SODA
2008
ACM
13 years 9 months ago
2008
ACM
New tight bounds are presented on the minimum length of planar straight line graphs connecting n given points in the plane and having convex faces. Specifically, we show that the ...
WAOA
2005
Springer
14 years 1 months ago
2005
Springer
A cycle cover of a graph is a set of cycles such that every vertex is part of exactly one cycle. An L-cycle cover is a cycle cover in which the length of every cycle is in the set...
ICDE
2009
IEEE
14 years 9 months ago
2009
IEEE
A common approach to performing keyword search over relational databases is to find the minimum Steiner trees in database graphs. These methods, however, are rather expensive as th...
COMGEO
2002
ACM
13 years 7 months ago
2002
ACM
We present a quadtree-based decomposition of the interior of a polygon with holes. The complete decomposition yields a constant factor approximation of the minimum weight Steiner ...