Sciweavers

ICYCS
2008
IEEE
14 years 6 months ago
A Trust-Enabling Support for Goal-Based Services
Service-Oriented Computing allows new applications to be developed by using and/or combining services offered by different providers. In several cases a service needs sensitive in...
Luiz Olavo Bonino da Silva Santos, Luís Fer...
FOCS
2008
IEEE
14 years 6 months ago
Entangled Games are Hard to Approximate
Julia Kempe, Hirotada Kobayashi, Keiji Matsumoto, ...
FOCS
2008
IEEE
14 years 6 months ago
k-Wise Independent Random Graphs
We study the k-wise independent relaxation of the usual model G(N, p) of random graphs where, as in this model, N labeled vertices are fixed and each edge is drawn with probabili...
Noga Alon, Asaf Nussboim
FOCS
2008
IEEE
14 years 6 months ago
Size Bounds and Query Plans for Relational Joins
Relational joins are at the core of relational algebra, which in turn is the core of the standard database query language SQL. As their evaluation is expensive and very often domi...
Albert Atserias, Martin Grohe, Dániel Marx
FOCS
2008
IEEE
14 years 6 months ago
Beating the Random Ordering is Hard: Inapproximability of Maximum Acyclic Subgraph
We prove that approximating the Max Acyclic Subgraph problem within a factor better than 1/2 is Unique-Games hard. Specifically, for every constant ε > 0 the following holds:...
Venkatesan Guruswami, Rajsekar Manokaran, Prasad R...
FOCS
2008
IEEE
14 years 6 months ago
Unique Games with Entangled Provers are Easy
We consider one-round games between a classical verifier and two provers who share entanglement. We show that when the constraints enforced by the verifier are ‘unique’ cons...
Julia Kempe, Oded Regev, Ben Toner
FOCS
2008
IEEE
14 years 6 months ago
Constant-Time Approximation Algorithms via Local Improvements
We present a technique for transforming classical approximation algorithms into constant-time algorithms that approximate the size of the optimal solution. Our technique is applic...
Huy N. Nguyen, Krzysztof Onak
FOCS
2008
IEEE
14 years 6 months ago
Lower Bounds for Noisy Wireless Networks using Sampling Algorithms
We show a tight lower bound of Ω(N log log N) on the number of transmissions required to compute several functions (including the parity function and the majority function) in a...
Chinmoy Dutta, Jaikumar Radhakrishnan
FOCS
2008
IEEE
14 years 6 months ago
On the Hardness of Being Truthful
The central problem in computational mechanism design is the tension between incentive compatibility and computational ef ciency. We establish the rst significant approximability ...
Christos H. Papadimitriou, Michael Schapira, Yaron...
FOCS
2008
IEEE
14 years 6 months ago
Rounding Parallel Repetitions of Unique Games
Boaz Barak, Moritz Hardt, Ishay Haviv, Anup Rao, O...