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Listar por autor "Güemes Alzaga, María Belén"
Mostrando ítems 1-17 de 17
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Artículo
A computational approach to analyze the Hadamard quasigroup product
Falcón Ganfornina, Raúl Manuel; Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Frau García, María Dolores; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén (American Institute of Mathematical Sciences (AIMS), 2023-03-30)Based on the binary product described by any Latin square, the Hadamard quasigroup product is introduced in this paper as ...
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Artículo
A Mixed Heuristic for Generating Cocyclic Hadamard Matrices
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Falcón Ganfornina, Raúl Manuel; Frau García, María Dolores; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén; Osuna Lucena, Amparo (Springer, 2018)A way of generating cocyclic Hadamard matrices is described, which combines a new heuristic, coming from a novel notion ...
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Ponencia
ACS Searching for D4t-Hadamard Matrices
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Frau García, María Dolores; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén; Martín García, Elena; Osuna Lucena, Amparo (Springer, 2010)An Ant Colony System (ACS) looking for cocyclic Hadamard matrices over dihedral groups D4t is described. The underlying ...
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Artículo
Cocyclic Hadamard matrices over Latin rectangles
Álvarez Solano, Víctor; Falcón Ganfornina, Raúl Manuel; Frau García, María Dolores; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén (Elsevier, 2019)In the literature, the theory of cocyclic Hadamard matrices has always been developed over finite groups. This paper ...
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Ponencia
Cocyclic Hadamard matrices over Latin rectangles
Falcón Ganfornina, Raúl Manuel; Frau García, María Dolores; Güemes Alzaga, María Belén; Gudiel Rodríguez, Félix; Álvarez Solano, Víctor (2017) -
Artículo
Equivalences of Zt×Z22-cocyclic Hadamard matrices
Álvarez Solano, Víctor; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén; Horadam, K.J.; Rao, A. (Cornell University, 2015)One of the most promising structural approaches to resolving the Hadamard Conjecture uses the family of cocyclic matrices ...
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Artículo
GA Based Robust Blind Digital Watermarking
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Frau García, María Dolores; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén; Martín García, Elena; Osuna Lucena, Amparo (Elsevier, 2018)A genetic algorithm based robust blind digital watermarking scheme is presented. The experimental results show that our ...
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Artículo
Generating binary partial Hadamard matrices
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Falcón Ganfornina, Raúl Manuel; Frau García, María Dolores; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén; Osuna Lucena, Amparo (Elsevier, 2019)This paper deals with partial binary Hadamard matrices. Although there is a fast simple way to generate about a half ...
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Ponencia
Generating partial Hadamard matrices as solutions to a Constraint Satisfaction Problem characterizing cliques
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Falcón Ganfornina, Raúl Manuel; Frau García, María Dolores; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén; Osuna Lucena, Amparo (2017-07)A procedure is described looking for partial Hadamard matrices, as cliques of a particular subgraph Gt of Ito’s Hadamard ...
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Artículo
Hadamard Matrices with Cocyclic Core
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Frau García, María Dolores; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén; Osuna Lucena, Amparo (MDPI, 2021)Since Horadam and de Launey introduced the cocyclic framework on combinatorial designs in the 1990s, it has revealed ...
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Tesis Doctoral
Matrices cocíclicas de Hadamard sobre el Grupo Zt x Z 2*2 Descripción, clasificación y búsqueda
Güemes Alzaga, María Belén (2011) -
Artículo
On Cocyclic Hadamard Matrices over Goethals-Seidel Loops
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Falcón Ganfornina, Raúl Manuel; Frau García, María Dolores; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén; Osuna Lucena, Amparo (MDPI, 2020)About twenty-five years ago, Horadam and de Launey introduced the cocyclic development of designs, from which the notion ...
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Artículo
On D4t-Cocyclic Hadamard Matrices
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Frau García, María Dolores; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén; Osuna Lucena, Amparo (Wiley, 2016)In this paper, we describe some necessary and sufficient conditions for a set of coboundaries to yield a cocyclic Hadamard ...
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Artículo
On ZZt × ZZ2 2-cocyclic Hadamard matrices
Álvarez Solano, Víctor; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén (Wiley, 2015)A characterization of ZZt × ZZ22 -cocyclic Hadamard matrices is described, de- pending on the notions of distributions, ...
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Ponencia
(Pseudo)-cocyclic (structured) Hadamard matrices over (quasi)groups
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Falcón Ganfornina, Raúl Manuel; Frau García, María Dolores; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén; Kotsireas, Ilias (2017)Progressing on a survey of the state of the art of cocyclic constructions for Hadamard matrices, we will prove that the ...
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Artículo
Pseudococyclic Partial Hadamard Matrices over Latin Rectangles
Falcón Ganfornina, Raúl Manuel; Álvarez, Víctor; Frau García, María Dolores; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén (MDPI [Commercial Publisher], 2021-01-06)The classical design of cocyclic Hadamard matrices has recently been generalized by means of both the notions of the cocycle ...
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Ponencia
Searching for partial Hadamard matrices
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Frau García, María Dolores; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén; Martín García, Elena; Osuna Lucena, Amparo (Universidade de Santiago de Compostela, Servicio de Publicaciones, 2010)Three algorithms looking for pretty large partial Hadamard ma- trices are described. Here “large” means that hopefully ...