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» Towards Polynomial Lower Bounds for Dynamic Problems
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VMCAI
2005
Springer
14 years 3 months ago
Checking Herbrand Equalities and Beyond
A Herbrand equality between expressions in a program is an equality which holds relative to the Herbrand interpretation of operators. We show that the problem of checking validity ...
Markus Müller-Olm, Oliver Rüthing, Helmu...
FOCS
2004
IEEE
14 years 2 months ago
Extracting Randomness Using Few Independent Sources
In this work we give the first deterministic extractors from a constant number of weak sources whose entropy rate is less than 1/2. Specifically, for every > 0 we give an expl...
Boaz Barak, Russell Impagliazzo, Avi Wigderson
SODA
2001
ACM
102views Algorithms» more  SODA 2001»
13 years 11 months ago
Approximate majorization and fair online load balancing
This paper relates the notion of fairness in online routing and load balancing to vector majorization as developed by Hardy, Littlewood, and Polya 9]. We de ne -supermajorization ...
Ashish Goel, Adam Meyerson, Serge A. Plotkin
CJ
2006
123views more  CJ 2006»
13 years 10 months ago
Unconditionally Secure Anonymous Encryption and Group Authentication
Anonymous channels or similar techniques that can achieve sender's anonymity play important roles in many applications. However, they will be meaningless if cryptographic prim...
Goichiro Hanaoka, Junji Shikata, Yumiko Hanaoka, H...
ICCV
2009
IEEE
15 years 3 months ago
Joint optimization of segmentation and appearance models
Many interactive image segmentation approaches use an objective function which includes appearance models as an unknown variable. Since the resulting optimization problem is NP-har...
Sara Vicente, Vladimir Kolmogorov, Carsten Rother