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» A note on the query complexity of the Condorcet winner probl...
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IANDC
2010
67views more  IANDC 2010»
13 years 3 months ago
Parameterized computational complexity of Dodgson and Young elections
We show that the two NP-complete problems of Dodgson Score and Young Score have differing computational complexities when the winner is close to being a Condorcet winner. On the ...
Nadja Betzler, Jiong Guo, Rolf Niedermeier
PODS
1994
ACM
138views Database» more  PODS 1994»
13 years 9 months ago
Dyn-FO: A Parallel, Dynamic Complexity Class
Traditionally, computational complexity has considered only static problems. Classical Complexity Classes such as NC, P, and NP are de ned in terms of the complexity of checking {...
Sushant Patnaik, Neil Immerman
STOC
2009
ACM
155views Algorithms» more  STOC 2009»
14 years 5 months ago
A nearly optimal oracle for avoiding failed vertices and edges
We present an improved oracle for the distance sensitivity problem. The goal is to preprocess a directed graph G = (V, E) with non-negative edge weights to answer queries of the f...
Aaron Bernstein, David R. Karger
PODS
2009
ACM
119views Database» more  PODS 2009»
14 years 5 months ago
Dynamic indexability and lower bounds for dynamic one-dimensional range query indexes
The B-tree is a fundamental external index structure that is widely used for answering one-dimensional range reporting queries. Given a set of N keys, a range query can be answere...
Ke Yi