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MOBIHOC
2003
ACM
16 years 6 months ago
Worst-Case optimal and average-case efficient geometric ad-hoc routing
In this paper we present GOAFR, a new geometric ad-hoc routing algorithm combining greedy and face routing. We evaluate this algorithm by both rigorous analysis and comprehensive ...
Fabian Kuhn, Roger Wattenhofer, Aaron Zollinger
EDBTW
2010
Springer
16 years 1 months ago
Updating probabilistic XML
We investigate the complexity of performing updates on probabilistic XML data for various classes of probabilistic XML documents of different succinctness. We consider two elemen...
Evgeny Kharlamov, Werner Nutt, Pierre Senellart
ISSAC
2009
Springer
144views Mathematics» more  ISSAC 2009»
16 years 1 months ago
H-LLL: using householder inside LLL
We describe a new LLL-type algorithm, H-LLL, that relies on Householder transformations to approximate the underlying Gram-Schmidt orthogonalizations. The latter computations are ...
Ivan Morel, Damien Stehlé, Gilles Villard
COMPGEOM
2009
ACM
16 years 1 months ago
Approximate center points with proofs
We present the Iterated-Tverberg algorithm, the first deterministic algorithm for computing an approximate centerpoint of a set S ∈ Rd with running time sub-exponential in d. T...
Gary L. Miller, Donald Sheehy
COMPGEOM
2009
ACM
16 years 1 months ago
Minimum cuts and shortest homologous cycles
We describe the first algorithms to compute minimum cuts in surface-embedded graphs in near-linear time. Given an undirected graph embedded on an orientable surface of genus g, w...
Erin W. Chambers, Jeff Erickson, Amir Nayyeri