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DCC
2007
IEEE
14 years 7 months ago
A sequence approach to linear perfect hash families
A linear (qd, q, t)-perfect hash family of size s in a vector space V of order qd over a field F of order q consists of a set S = {1, . . . , s} of linear functionals from V to F ...
Susan G. Barwick, Wen-Ai Jackson
DISOPT
2007
93views more  DISOPT 2007»
13 years 7 months ago
A polynomial time equivalence between DNA sequencing and the exact perfect matching problem
We investigate the computational complexity of a combinatorial problem that arises in DNA sequencing by hybridization: The input consists of an integer together with a set S of wo...
Jacek Blazewicz, Piotr Formanowicz, Marta Kasprzak...
JGT
2006
97views more  JGT 2006»
13 years 7 months ago
Matchings in hypergraphs of large minimum degree
It is well known that every bipartite graph with vertex classes of size n whose minimum degree is at least n/2 contains a perfect matching. We prove an analogue of this result for...
Daniela Kühn, Deryk Osthus
ACNS
2006
Springer
92views Cryptology» more  ACNS 2006»
14 years 1 months ago
Real Perfect Contrast Visual Secret Sharing Schemes with Reversing
The visual secret sharing (VSS for short) scheme is a secret image sharing scheme. A secret image is visually revealed from overlapping shadow images without additional computation...
Ching-Nung Yang, Chung-Chun Wang, Tse-Shih Chen
DM
2008
77views more  DM 2008»
13 years 6 months ago
Perfect Skolem sets
A Skolem sequence is a sequence s1, s2, . . . , s2n (where si A = {1 . . . n}), each si occurs exactly twice in the sequence and the two occurrences are exactly si positions apar...
Gustav Nordh