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Listar por autor "Armario Sampalo, José Andrés"
Mostrando ítems 21-40 de 58
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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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Tesis Doctoral
Estructuras multiplicativas y homología de fibrados
Armario Sampalo, José Andrés (1999)Como es bien conocido, los principales mecanismos algebraicos para obtener información homológica de los espacios fibrados ...
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Trabajo Fin de Máster
Funciones Bent en Criptografía
García Zambrano, Álvaro (2023)In this project a certain class of Boolean function is introduced, the so called bent function. Since our approach is ...
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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
Generalized binary arrays from quasi-orthogonal cocycles
Armario Sampalo, José Andrés; Flannery, D. L. (Springer, 2019)Generalized perfect binary arrays (GPBAs) were used by Jedwab to construct perfect binary arrays. A non-trivial GPBA can ...
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Artículo
Generalized Hadamard full propelinear codes
Armario Sampalo, José Andrés; Bailera, Iván; Egan, Ronan (Springer, 2021)Codes from generalized Hadamard matrices have already been introduced. Here we deal with these codes when the generalized ...
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Artículo
Generalized partially bent functions, generalized perfect arrays, and cocyclic Butson matrices
Armario Sampalo, José Andrés; Egan, Ronan; Flannery, Dane L. (Springer, 2023-08-23)In a recent survey, Schmidt compiled equivalences between generalized bent functions, group invariant Butson Hadamard ...
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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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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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Ponencia
On (−1, 1)-Matrices of Skew Type with the Maximal Determinant and Tournaments
Armario Sampalo, José Andrés (Springer, 2014)Skew Hadamard matrices of order n give the solution to the question of finding the largest possible n by n determinant ...
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Artículo
On an inequivalence criterion for cocyclic Hadamard matrices
Armario Sampalo, José Andrés (Springer, 2010)Given two Hadamard matrices of the same order, it can be quite difficult to decide whether or not they are equivalent. ...
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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 ...