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» Upper and lower Ramsey bounds in bounded arithmetic
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GC
2007
Springer
13 years 8 months ago
On Small and Large Hyperplanes of DW (5, q )
We determine lower and upper bounds for the size of a hyperplane of the dual polar space DW(5, q). In some cases, we also determine all hyperplanes attaining these bounds.
Bart De Bruyn, Harm Pralle
DLOG
2011
13 years 1 days ago
Status QIO: An Update
We prove co-N2ExpTime-hardness for conjunctive query entailment in the description logic ALCOIF , thus improving the previously known 2ExpTime lower bound. The result transfers to ...
Birte Glimm, Yevgeny Kazakov, Carsten Lutz
FOCS
2000
IEEE
14 years 28 days ago
Fast parallel circuits for the quantum Fourier transform
We give new bounds on the circuit complexity of the quantum Fourier transform (QFT). We give an upper bound of Ç´ÐÓ Ò · ÐÓ ÐÓ ´½ µµ on the circuit depth for computin...
Richard Cleve, John Watrous
NIPS
2007
13 years 10 months ago
Loop Series and Bethe Variational Bounds in Attractive Graphical Models
Variational methods are frequently used to approximate or bound the partition or likelihood function of a Markov random field. Methods based on mean field theory are guaranteed ...
Erik B. Sudderth, Martin J. Wainwright, Alan S. Wi...
EUROCRYPT
2004
Springer
14 years 1 months ago
Optimal Communication Complexity of Generic Multicast Key Distribution
We prove a tight lower bound for generic protocols for secure multicast key distribution where the messages sent by the group manager for rekeying the group are obtained by arbitra...
Daniele Micciancio, Saurabh Panjwani