M. Frau

most citedSearching for partial Hadamard matrices

3 citations · 3 across the 2 of their papers we have counts for

collaborators

2 papers

math.CO2013

Determinants of $(- 1, 1)$ -matrices of the skew-symmetric type: a cocyclic approach

V. Álvarez, J. A. Armario, M. D. Frau +1

An $n$ by $n$ skew-symmetric type $(- 1, 1)$ -matrix $K = [k_{i, j}]$ has $1$ 's on the main diagonal and $\pm 1$ 's elsewhere with $k_{i, j} = - k_{j, i}$ . The largest possible determinant of…

math.CO2012★ 3 cited

Searching for partial Hadamard matrices

Víctor Álvarez, José-Andrés Armario, María-Dolores Frau +4

Three algorithms looking for pretty large partial Hadamard matrices are described. Here "large" means that hopefully about a third of a Hadamard matrix (which is the best asymptoti…

Determinants of (−1,1)-matrices of the skew-symmetric type: a cocyclic approach

Searching for partial Hadamard matrices

Determinants of $(- 1, 1)$ -matrices of the skew-symmetric type: a cocyclic approach