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ICALP
2005
Springer
16 years 5 days ago
Hadamard Tensors and Lower Bounds on Multiparty Communication Complexity
We develop a new method for estimating the discrepancy of tensors associated with multiparty communication problems in the “Number on the Forehead” model of Chandra, Furst and...
Jeff Ford, Anna Gál
178
Voted
ICALP
2005
Springer
16 years 5 days ago
Tight Lower Bounds for Query Processing on Streaming and External Memory Data
We study a clean machine model for external memory and stream processing. We show that the number of scans of the external data induces a strict hierarchy (as long as work space is...
Martin Grohe, Christoph Koch, Nicole Schweikardt
158
Voted
ICALP
2005
Springer
16 years 5 days ago
A Better Approximation Ratio for the Vertex Cover Problem
We reduce the approximation factor for Vertex Cover to 2 − Θ( 1√ log n ) (instead of the previous 2 − Θ(log log n log n ), obtained by Bar-Yehuda and Even [2], and by Moni...
George Karakostas
ICALP
2005
Springer
16 years 5 days ago
Optimistic Asynchronous Atomic Broadcast
This paper presents a new protocol for atomic broadcast in an asynchronous network with a maximal number of Byzantine failures. It guarantees both safety and liveness without maki...
Klaus Kursawe, Victor Shoup
147
Voted
ICALP
2005
Springer
16 years 5 days ago
Quantum Complexity of Testing Group Commutativity
We consider the problem of testing the commutativity of a black-box group specified by its k generators. The complexity (in terms of k) of this problem was first considered by Pa...
Frédéric Magniez, Ashwin Nayak
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