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» Computing the betti numbers of arrangements
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STOC
2005
ACM
115views Algorithms» more  STOC 2005»
14 years 11 months ago
Computing the first Betti number and the connected components of semi-algebraic sets
In this paper we describe the first singly exponential algorithm for computing the first Betti number of a given semi-algebraic set. We also describe algorithms for obtaining semi...
Saugata Basu, Richard Pollack, Marie-Franço...
JC
2007
130views more  JC 2007»
13 years 10 months ago
On the complexity of deciding connectedness and computing Betti numbers of a complex algebraic variety
We extend the lower bounds on the complexity of computing Betti numbers proved in [6] to complex algebraic varieties. More precisely, we first prove that the problem of deciding ...
Peter Scheiblechner
STOC
1996
ACM
197views Algorithms» more  STOC 1996»
14 years 3 months ago
Computing Betti Numbers via Combinatorial Laplacians
We use the Laplacian and power method to compute Betti numbers of simplicial complexes. This has a number of advantages over other methods, both in theory and in practice. It requ...
Joel Friedman