Álvarez, V.; Falcón, R. M.; Frau, M. D.; Gudiel, F.; Güemes, B. Cocyclic Hadamard matrices over Latin rectangles. (English) Zbl 1414.05060 Eur. J. Comb. 79, 75-96 (2019). MSC: 05B20 05B15 PDFBibTeX XMLCite \textit{V. Álvarez} et al., Eur. J. Comb. 79, 75--96 (2019; Zbl 1414.05060) Full Text: DOI Link
Alvarez, V.; Armario, J. A.; Falcón, R. M.; Frau, M. D.; Gudiel, F.; Güemes, M. B.; Osuna, A. A mixed heuristic for generating cocyclic Hadamard matrices. (English) Zbl 1444.05030 Math. Comput. Sci. 12, No. 4, 407-417 (2018). MSC: 05B20 05B30 PDFBibTeX XMLCite \textit{V. Alvarez} et al., Math. Comput. Sci. 12, No. 4, 407--417 (2018; Zbl 1444.05030) Full Text: DOI
Rifà, Josep; Suárez Canedo, Emilio Hadamard full propelinear codes of type Q; rank and kernel. (English) Zbl 1411.94102 Des. Codes Cryptography 86, No. 9, 1905-1921 (2018). MSC: 94B05 PDFBibTeX XMLCite \textit{J. Rifà} and \textit{E. Suárez Canedo}, Des. Codes Cryptography 86, No. 9, 1905--1921 (2018; Zbl 1411.94102) Full Text: DOI arXiv Link
Álvarez, Víctor; Armario, José Andrés; Frau, María Dolores; Gudiel, Félix; Güemes, Maria Belén; Osuna, Amparo On \(D_{4t}\)-cocyclic Hadamard matrices. (English) Zbl 1343.05042 J. Comb. Des. 24, No. 8, 352-368 (2016). MSC: 05B20 PDFBibTeX XMLCite \textit{V. Álvarez} et al., J. Comb. Des. 24, No. 8, 352--368 (2016; Zbl 1343.05042) Full Text: DOI
Álvarez, Víctor; Gudiel, Félix; Güemes, Maria Belén On \(\mathbb{Z}_t\times\mathbb{Z}^2_2\)-cocyclic Hadamard matrices. (English) Zbl 1322.05030 J. Comb. Des. 23, No. 8, 352-368 (2015). MSC: 05B20 PDFBibTeX XMLCite \textit{V. Álvarez} et al., J. Comb. Des. 23, No. 8, 352--368 (2015; Zbl 1322.05030) Full Text: DOI arXiv
Álvarez, Víctor; Armario, José Andrés; Frau, María Dolores; Gudiel, Félix Determinants of \((-1,1)\)-matrices of the skew-symmetric type: a cocyclic approach. (English) Zbl 1307.05031 Open Math. 13, 16-25 (2015). MSC: 05B20 15A15 PDFBibTeX XMLCite \textit{V. Álvarez} et al., Open Math. 13, 16--25 (2015; Zbl 1307.05031) Full Text: DOI arXiv
Rifà i Coma, J.; Suárez Canedo, E. About a class of Hadamard propelinear codes. (English) Zbl 1338.94107 Rodríguez Velázques, Juan Alberto (ed.) et al., Extended abstracts of the IX “Jornadas de matemática discreta y algorítmica” (JMDA), Tarragona, Spain, July 7–9, 2014. Amsterdam: Elsevier. Electronic Notes in Discrete Mathematics 46, 289-296, electronic only (2014). MSC: 94B25 05B20 05E15 PDFBibTeX XMLCite \textit{J. Rifà i Coma} and \textit{E. Suárez Canedo}, Electron. Notes Discrete Math. 46, 289--296 (2014; Zbl 1338.94107) Full Text: DOI Link
Álvarez, Víctor; Armario, José Andrés; Frau, María Dolores; Real, Pedro Homological models for semidirect products of finitely generated Abelian groups. (English) Zbl 1271.20063 Appl. Algebra Eng. Commun. Comput. 23, No. 1-2, 101-127 (2012). Reviewer: Olympia Talelli (Athens) MSC: 20J05 20J06 05B20 PDFBibTeX XMLCite \textit{V. Álvarez} et al., Appl. Algebra Eng. Commun. Comput. 23, No. 1--2, 101--127 (2012; Zbl 1271.20063) Full Text: DOI Link
Álvarez, V.; Armario, J. A.; Frau, M. D.; Gudiel, F. The maximal determinant of cocyclic (-1,1)-matrices over \(D_{2t}\). (English) Zbl 1236.05043 Linear Algebra Appl. 436, No. 4, 858-873 (2012). MSC: 05B20 15A15 PDFBibTeX XMLCite \textit{V. Álvarez} et al., Linear Algebra Appl. 436, No. 4, 858--873 (2012; Zbl 1236.05043) Full Text: DOI
Chen, Yu Qing Divisible designs and semi-regular relative difference sets from additive Hadamard cocycles. (English) Zbl 1232.05030 J. Comb. Theory, Ser. A 118, No. 8, 2185-2206 (2011). MSC: 05B10 05B05 PDFBibTeX XMLCite \textit{Y. Q. Chen}, J. Comb. Theory, Ser. A 118, No. 8, 2185--2206 (2011; Zbl 1232.05030) Full Text: DOI
Ó Catháin, Padraig; Röder, Marc The cocyclic Hadamard matrices of order less than 40. (English) Zbl 1246.05033 Des. Codes Cryptography 58, No. 1, 73-88 (2011). MSC: 05B20 05B10 PDFBibTeX XMLCite \textit{P. Ó Catháin} and \textit{M. Röder}, Des. Codes Cryptography 58, No. 1, 73--88 (2011; Zbl 1246.05033) Full Text: DOI
Armario, José Andrés On an inequivalence criterion for cocyclic Hadamard matrices. (English) Zbl 1225.05053 Cryptogr. Commun. 2, No. 2, 247-259 (2010). MSC: 05B20 68Q15 PDFBibTeX XMLCite \textit{J. A. Armario}, Cryptogr. Commun. 2, No. 2, 247--259 (2010; Zbl 1225.05053) Full Text: DOI Link
de Launey, Warwick; Kharaghani, H. On the asymptotic existence of cocyclic Hadamard matrices. (English) Zbl 1197.05021 J. Comb. Theory, Ser. A 116, No. 6, 1140-1153 (2009). MSC: 05B20 PDFBibTeX XMLCite \textit{W. de Launey} and \textit{H. Kharaghani}, J. Comb. Theory, Ser. A 116, No. 6, 1140--1153 (2009; Zbl 1197.05021) Full Text: DOI
Arasu, K. T.; Chen, Yu Qing; Pott, Alexander Hadamard and conference matrices. (English) Zbl 0996.05016 J. Algebr. Comb. 14, No. 2, 103-117 (2001). Reviewer: Giovanni Ferrero (Parma) MSC: 05B10 05B20 PDFBibTeX XMLCite \textit{K. T. Arasu} et al., J. Algebr. Comb. 14, No. 2, 103--117 (2001; Zbl 0996.05016) Full Text: DOI
de Launey, Warwick; Smith, Michael J. Cocyclic orthogonal designs and the asymptotic existence of cocyclic Hadamard matrices and maximal size relative difference sets with forbidden subgroup of size 2. (English) Zbl 1001.05032 J. Comb. Theory, Ser. A 93, No. 1, 37-92 (2001). Reviewer: Spencer P.Hurd (Charleston) MSC: 05B20 05B10 PDFBibTeX XMLCite \textit{W. de Launey} and \textit{M. J. Smith}, J. Comb. Theory, Ser. A 93, No. 1, 37--92 (2001; Zbl 1001.05032) Full Text: DOI Link
Flannery, D. L.; O’Brien, E. A. Computing 2-cocycles for central extensions and relative difference sets. (English) Zbl 0999.20047 Commun. Algebra 28, No. 4, 1939-1955 (2000). MSC: 20J06 20E22 20F05 20-04 68W30 05B10 PDFBibTeX XMLCite \textit{D. L. Flannery} and \textit{E. A. O'Brien}, Commun. Algebra 28, No. 4, 1939--1955 (2000; Zbl 0999.20047) Full Text: DOI
Horadam, K. J. An introduction to cocyclic generalised Hadamard matrices. (English) Zbl 0943.05025 Discrete Appl. Math. 102, No. 1-2, 115-131 (2000). MSC: 05B20 05B10 PDFBibTeX XMLCite \textit{K. J. Horadam}, Discrete Appl. Math. 102, No. 1--2, 115--131 (2000; Zbl 0943.05025) Full Text: DOI
de Launey, Warwick; Stafford, Richard M. On cocyclic weighing matrices and the regular group actions of certain Paley matrices. (English) Zbl 0961.05068 Discrete Appl. Math. 102, No. 1-2, 63-101 (2000). Reviewer: Mohammad-Reza Darafsheh (Tehran) MSC: 05E20 05B20 PDFBibTeX XMLCite \textit{W. de Launey} and \textit{R. M. Stafford}, Discrete Appl. Math. 102, No. 1--2, 63--101 (2000; Zbl 0961.05068) Full Text: DOI
de Launey, Warwick; Flannery, D. L.; Horadam, K. J. Cocyclic Hadamard matrices and difference sets. (English) Zbl 0956.05026 Discrete Appl. Math. 102, No. 1-2, 47-61 (2000). Reviewer: Alexander Pott (Magdeburg) MSC: 05B20 05B10 20J06 05B05 PDFBibTeX XMLCite \textit{W. de Launey} et al., Discrete Appl. Math. 102, No. 1--2, 47--61 (2000; Zbl 0956.05026) Full Text: DOI
Flannery, D. L. Cocyclic Hadamard matrices and Hadamard groups are equivalent. (English) Zbl 0889.05032 J. Algebra 192, No. 2, 749-779 (1997). Reviewer: V.D.Tonchev (Houghton) MSC: 05B20 20E22 05B10 20J05 PDFBibTeX XMLCite \textit{D. L. Flannery}, J. Algebra 192, No. 2, 749--779 (1997; Zbl 0889.05032) Full Text: DOI Link
Flannery, D. L. Calculation of cocyclic matrices. (English) Zbl 0867.20043 J. Pure Appl. Algebra 112, No. 2, 181-190 (1996). Reviewer: V.B.Mnukhin (Taganrog) MSC: 20J06 05B20 PDFBibTeX XMLCite \textit{D. L. Flannery}, J. Pure Appl. Algebra 112, No. 2, 181--190 (1996; Zbl 0867.20043) Full Text: DOI
de Launey, W.; Horadam, K. J. A weak difference set construction for higher dimensional designs. (English) Zbl 0838.05019 Des. Codes Cryptography 3, No. 1, 75-87 (1993). Reviewer: J.R.Seberry (Wollongong) MSC: 05B20 05B10 05B99 PDFBibTeX XMLCite \textit{W. de Launey} and \textit{K. J. Horadam}, Des. Codes Cryptography 3, No. 1, 75--87 (1993; Zbl 0838.05019) Full Text: DOI