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ICALP
2005
Springer
16 years 8 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 8 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
ICALP
2005
Springer
16 years 8 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
ICALP
2005
Springer
16 years 8 days ago
Single-Key AIL-MACs from Any FIL-MAC
Abstract. We investigate a general paradigm for constructing arbitraryinput-length (AIL) MACs from fixed-input-length (FIL) MACs, define the waste as the relevant efficiency para...
Ueli M. Maurer, Johan Sjödin
ICALP
2005
Springer
16 years 8 days ago
Up-to Techniques for Weak Bisimulation
Abstract. We study the use of the elaboration preorder (due to ArunKumar and Natarajan) in the framework of up-to techniques for weak bisimulation. We show that elaboration yields ...
Damien Pous
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