STOC
2009
ACM
14 years 5 months ago
2009
ACM
We describe the first algorithm to compute maximum flows in surface-embedded graphs in near-linear time. Specifically, given a graph embedded on a surface of genus g, with two spe...
STOC
2009
ACM
14 years 5 months ago
2009
ACM
A mechanism for releasing information about a statistical database with sensitive data must resolve a trade-off between utility and privacy. Publishing fully accurate information ...
STOC
2009
ACM
14 years 5 months ago
2009
ACM
We show how to compute the edit distance between two strings of length n up to a factor of 2 ~O( log n) in n1+o(1) time. This is the first sub-polynomial approximation algorithm f...
STOC
2009
ACM
14 years 5 months ago
2009
ACM
The continuous-time query model is a variant of the discrete query model in which queries can be interleaved with known operations (called "driving operations") continuo...
STOC
2009
ACM
14 years 5 months ago
2009
ACM
We study the question of basing symmetric key cryptography on weak secrets. In this setting, Alice and Bob share an n-bit secret W, which might not be uniformly random, but the ad...
STOC
2009
ACM
14 years 5 months ago
2009
ACM
We put forth a new computational notion of entropy, which measures the (in)feasibility of sampling high entropy strings that are consistent with a given protocol. Specifically, we...
STOC
2009
ACM
14 years 5 months ago
2009
ACM
We study integrality gaps for SDP relaxations of constraint satisfaction problems, in the hierarchy of SDPs defined by Lasserre. Schoenebeck [25] recently showed the first integra...
STOC
2009
ACM
14 years 5 months ago
2009
ACM
STOC
2009
ACM
14 years 5 months ago
2009
ACM
Submodular function maximization is a central problem in combinatorial optimization, generalizing many important problems including Max Cut in directed/undirected graphs and in hy...
STOC
2009
ACM
14 years 5 months ago
2009
ACM
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...