J. Armario

activity

20012024

most citedOn quasi-orthogonal cocycles

7 citations · 19 across the 13 of their papers we have counts for

collaborators

Showing 2013Show all

3 papers · 1 filter

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…

cs.IT2013

Self-Dual codes from $(- 1, 1)$ -matrices of skew symmetric type

José Andrés Armario, María Dolores Frau

Previously, self-dual codes have been constructed from weighing matrices, and in particular from conference matrices (skew and symmetric). In this paper, codes constructed from mat…

math.CO2013

On permanents of Sylvester Hadamard matrices

José Andrés Armario

It is well-known that the evaluation of the permanent of an arbitrary $(- 1, 1)$ -matrix is a formidable problem. Ryser's formula is one of the fastest known general algorithms for co…

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

Self-Dual codes from (−1,1)-matrices of skew symmetric type

On permanents of Sylvester Hadamard matrices

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

Self-Dual codes from $(- 1, 1)$ -matrices of skew symmetric type