16 citations · 57 across the 29 of their papers we have counts for
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On new infinite families of completely regular and completely transitive codes
Joaquim Borges, Josep Rifà, Victor Zinoviev
In two previous papers we constructed new families of completely regular codes by concatenation methods. Here we determine cases in which the new codes are completely transitive. F…
Rank and Kernel of -Additive Generalised Hadamard Codes
Steven T. Dougherty, Josep Rifà, Mercè Villanueva
A subset of a vector space is -additive if it is a linear space over the subfield . Let , prime, and . Bounds on the ra…
Ranks and Kernels of Codes from Generalized Hadamard Matrices
Steven T. Dougherty, Josep Rifà, Mercè Villanueva
The ranks and kernels of generalized Hadamard matrices are studied. It is proven that any generalized Hadamard matrix over , , or and , g…
On a family of binary completely transitive codes with growing covering radius
J. Rifa, V. Zinoviev
A new family of binary linear completely transitive (and, therefore, completely regular) codes is constructed. The covering radius of these codes is growing with the length of the…
Self-embeddings of Hamming Steiner triple systems of small order and APN permutations
J. Rifà, F. I. Solov'eva, M. Villanueva
The classification, up to isomorphism, of all self-embedding monomial power permutations of Hamming Steiner triple systems of order n=2^m-1 for small m, m < 23, is given. As far as…
Families of Hadamard Z2Z4Q8-codes
Ángel del Rio, Josep Rifà
A Z2Z4Q8-code is a non-empty subgroup of a direct product of copies of Z_2, Z_4 and Q_8 (the binary field, the ring of integers modulo 4 and the quaternion group on eight elements,…