Buscar
Mostrando ítems 1-6 de 6
Ponencia
On (−1, 1)-Matrices of Skew Type with the Maximal Determinant and Tournaments
(Springer, 2014)
Skew Hadamard matrices of order n give the solution to the question of finding the largest possible n by n determinant with entries ± 1 of skew type when n≡0(mod4) . Characterizations of skew Hadamard matrices in terms ...
Capítulo de Libro
A Mathematica Notebook for Computing the Homology of Iterated Products of Groups
(2006)
Let G be a group which admits the structure of an iterated product of central extensions and semidirect products of abelian groups G i (both finite and infinite). We describe a Mathematica 4.0 notebook for computing the ...
Capítulo de Libro
An algorithm for computing cocyclic matrices developed over some semidirect products
(2001)
An algorithm for calculating a set ofgenerators ofrepresentative 2-cocycles on semidirect product offinite abelian groups is constructed, in light ofthe theory over cocyclic matrices developed by Horadam and de Launey in ...
Capítulo de Libro
A genetic algorithm for cocyclic hadamard matrices
(2006)
A genetic algorithm for finding cocyclic Hadamard matrices is described. Though we focus on the case of dihedral groups, the algorithm may be easily extended to cover any group. Some executions and examples are also included, ...
Capítulo de Libro
Calculating cocyclic hadamard matrices in Mathematica: exhaustive and heuristic searches
(2006)
We describe a notebook in Mathematica which, taking as input data a homological model for a finite group G of order |G| = 4t, performs an exhaustive search for constructing the whole set of cocyclic Hadamard matrices over ...
Capítulo de Libro
Comparison maps for relatively free resolutions
(2006)
Let Λ be a commutative ring, A an augmented differential graded algebra over Λ (briefly, DGA-algebra) and X be a relatively free resolution of Λ over A. The standard bar resolution of Λ over A, denoted by B(A), provides ...