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Listar por autor "Álvarez Solano, Víctor"
Mostrando ítems 21-40 de 48
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Tesis Doctoral
Desarrollo cocíclico de diseños y aplicaciones
Frau García, María Dolores (2003) -
Artículo
Determinants of (–1,1)-matrices of the skew-symmetric type: a cocyclic approach
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Frau García, María Dolores; Gudiel Rodríguez, Félix (Walter de Gruyter GmbH, 2015)An n by n skew-symmetric type (−1, 1)-matrix K = [ki,j ] has 1’s on the main diagonal and ±1’s elsewhere with ki,j = ...
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Artículo
Embedding cocylic D-optimal designs in cocylic Hadamard matrices
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Frau García, María Dolores; Gudiel Rodríguez, Félix (International Linear Algebra Society, 2012)A method for embedding cocyclic submatrices with “large” determinants of orders 2t in certain cocyclic Hadamard matrices ...
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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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Ponencia
Error correcting codes from quasi-Hadamard matrices
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Frau García, María Dolores; Martín García, Elena; Osuna Lucena, Amparo (Springer, 2007)Levenshtein described in [5] a method for constructing error correcting codes which meet the Plotkin bounds, provided ...
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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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Ponencia
Gröbner bases and cocyclic Hadamard matrices
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Falcón Ganfornina, Raúl Manuel; Frau García, María Dolores; Gudiel Rodríguez, Félix (2017-07) -
Artículo
Gröbner bases and cocyclic Hadamard matrices
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Falcón Ganfornina, Raúl Manuel; Frau García, María Dolores; Gudiel Rodríguez, Félix (Elsevier, 2018)Hadamard ideals were introduced in 2006 as a set of nonlin-ear polynomial equations whose zeros are uniquely related ...
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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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Artículo
Homological models for semidirect products of finitely generated Abelian groups
Álvarez Solano, Víctor; Frau García, María Dolores; Real Jurado, Pedro; Armario Sampalo, José Andrés (2012)Let G be a semidirect product of finitely generated Abelian groups. We provide a method for constructing an explicit ...
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Ponencia
Homological perturbation theory and computability of Hochschild and cyclic homologies of CDGAs
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Real Jurado, Pedro; Silva Gallardo, Beatriz (Diffiety Institute of the Russian Academy of Natural Sciences, 1997)We establish an algorithm computing the homology of commutative differential graded algebras (briefly, CDGAs). The main ...
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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) -
Ponencia
Matrices cocíclicas de Hadamard sobre productos semidirectos
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Frau García, María Dolores; Real Jurado, Pedro (Alberto Márquez, 2002) -
Ponencia
Un nuevo esquema de autenticación gráfica basado en cuadrados latinos
Falcón Ganfornina, Raúl Manuel; Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Frau García, María Dolores; González Regadera, Manuel; Gudiel Rodríguez, Félix; Güemes Alzaga, María Belén (Universidad de Sevilla. Escuela Técnica Superior de Ingeniería Informática, 2024)En contraposición a las contraseñas alfanuméricas, los esquemas de autenticación gráfica presentan un entorno amigable más ...
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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 higher dimensional cocyclic Hadamard matrices
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Frau García, María Dolores; Real Jurado, Pedro (2015)Provided that a cohomological model for G is known, we describe a method for constructing a basis for n-cocycles over G, ...
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Ponencia
On the computability of the p-local homology of twisted cartesian products of Eilenberg-Mac Lane spaces
Álvarez Solano, Víctor; Armario Sampalo, José Andrés; Real Jurado, Pedro (Universidade do Minho, 1997)Working in the framework of the Simplicial Topology, a method for calculating the p-local homology of a twisted cartesian ...