Sciweavers

3415 search results - page 533 / 683
» Lower Bounds for Kernelizations
Sort
View
VTC
2007
IEEE
15 years 10 months ago
Opportunistic Feedback Protocol for Achieving Sum-Capacity of the MIMO Broadcast Channel
—This paper presents an opportunistic feedback (OF) protocol that achieves the asymptotic sum-capacity of the fading broadcast channel (BC) with a limited amount of feedback. The...
Rajiv Agarwal, Chan-Soo Hwang, John M. Cioffi
APPROX
2007
Springer
92views Algorithms» more  APPROX 2007»
15 years 10 months ago
Sublinear Algorithms for Approximating String Compressibility
We raise the question of approximating the compressibility of a string with respect to a fixed compression scheme, in sublinear time. We study this question in detail for two popu...
Sofya Raskhodnikova, Dana Ron, Ronitt Rubinfeld, A...
CRYPTO
2007
Springer
109views Cryptology» more  CRYPTO 2007»
15 years 10 months ago
A Tight High-Order Entropic Quantum Uncertainty Relation with Applications
We derive a new entropic quantum uncertainty relation involving min-entropy. The relation is tight and can be applied in various quantum-cryptographic settings. Protocols for quant...
Ivan Damgård, Serge Fehr, Renato Renner, Lou...
CRYPTO
2007
Springer
162views Cryptology» more  CRYPTO 2007»
15 years 10 months ago
Universally-Composable Two-Party Computation in Two Rounds
Round complexity is a central measure of efficiency, and characterizing the round complexity of various cryptographic tasks is of both theoretical and practical importance. We show...
Omer Horvitz, Jonathan Katz
CSL
2007
Springer
15 years 10 months ago
Game Characterizations and the PSPACE-Completeness of Tree Resolution Space
The Prover/Delayer game is a combinatorial game that can be used to prove upper and lower bounds on the size of Tree Resolution proofs, and also perfectly characterizes the space ...
Alexander Hertel, Alasdair Urquhart