Sciweavers

DCC
2008
IEEE
14 years 11 months ago
Coprimitive sets and inextendable codes
Complete (n, r)-arcs in PG(k - 1, q) and projective (n, k, n - r)q-codes that admit no projective extensions are equivalent objects. We show that projective codes of reasonable le...
T. L. Alderson, Aiden A. Bruen
DCC
2008
IEEE
14 years 11 months ago
Random constructions and density results
András Gács, Tamás Szönyi
DCC
2008
IEEE
14 years 11 months ago
Sequences in abelian groups G of odd order without zero-sum subsequences of length exp ( G )
We present a new construction for sequences in the finite abelian group Cr n without zero-sum subsequences of length n, for odd n. This construction improves the maximal known car...
Yves Edel
DCC
2008
IEEE
14 years 11 months ago
Finite geometries
Aart Blokhuis, James W. P. Hirschfeld, Dieter Jung...
DCC
2008
IEEE
14 years 11 months ago
Explicit constructions for perfect hash families
Let k, v, t be integers such that k v t 2. A perfect hash family PHF(N; k, v, t) can be defined as an N ? k array with entries from a set of v symbols such that every N ?t suba...
Sosina Martirosyan, Tran van Trung
DCC
2008
IEEE
14 years 11 months ago
Williamson matrices up to order 59
A recent result of Schmidt has brought Williamson matrices back into the spotlight. In this paper a new algorithm is introduced to search for hard to find Williamson matrices. We ...
Wolf H. Holzmann, Hadi Kharaghani, Behruz Tayfeh-R...
DCC
2008
IEEE
14 years 11 months ago
Homogeneous factorisations of Johnson graphs
For a graph , subgroups M < G Aut(), and an edge partition E of , the pair (, E) is a (G, M)-homogeneous factorisation if M is vertex-transitive on and fixes setwise each part...
Maria Cristeta Cuaresma, Michael Giudici, Cheryl E...
DCC
2008
IEEE
14 years 11 months ago
Obtaining a secure and efficient key agreement protocol from (H)MQV and NAXOS
LaMacchia, Lauter and Mityagin recently presented a strong security definition for authenticated key agreement strengthening the well-known Canetti-Krawczyk definition. They also ...
Berkant Ustaoglu
DCC
2008
IEEE
14 years 11 months ago
On Boolean functions with the sum of every two of them being bent
A set of Boolean functions is called a bent set if the sum of any two distinct members is a bent function. We show that any bent set yields a homogeneous system of linked symmetric...
Christian Bey, Gohar M. M. Kyureghyan
DCC
2008
IEEE
14 years 11 months ago
New negative Latin square type partial difference sets in nonelementary abelian 2-groups and 3-groups
A partial difference set having parameters (n2, r(n - 1), n + r2 - 3r, r2 - r) is called a Latin square type partial difference set, while a partial difference set having paramete...
John B. Polhill