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Listar por autor "Armario Sampalo, José Andrés"                

Mostrando ítems 21-40 de 57

    • Ponencia
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      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 ...
    • Tesis Doctoral
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      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 ...
    • Trabajo Fin de Máster
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      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 ...
    • Artículo
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      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 ...
    • Artículo
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      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 ...
    • Artículo
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      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 ...
    • Artículo
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      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 ...
    • Artículo
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      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 ...
    • Ponencia
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      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 ...
    • Ponencia
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      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
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      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 ...
    • Artículo
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      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 ...
    • Artículo
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      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 ...
    • Ponencia
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      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 ...
    • Ponencia
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      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
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      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 ...
    • Artículo
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      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. ...
    • Artículo
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      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 ...
    • Artículo
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      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 ...
    • Artículo
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      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, ...