Araya, Makoto; Harada, Masaaki; Momihara, Koji Hadamard matrices related to a certain series of ternary self-dual codes. (English) Zbl 1526.94053 Des. Codes Cryptography 91, No. 3, 795-805 (2023). Reviewer: Thomas Britz (Sydney) MSC: 94B05 05B20 PDFBibTeX XMLCite \textit{M. Araya} et al., Des. Codes Cryptography 91, No. 3, 795--805 (2023; Zbl 1526.94053) Full Text: DOI arXiv
Momihara, Koji; Suda, Sho; Xiang, Qing Square \((1,-1)\)-matrices with large determinants and near-Hadamard matrices. (English) Zbl 1500.15026 Linear Algebra Appl. 654, 28-55 (2022). MSC: 15B34 05B20 15A15 PDFBibTeX XMLCite \textit{K. Momihara} et al., Linear Algebra Appl. 654, 28--55 (2022; Zbl 1500.15026) Full Text: DOI
Momihara, Koji New constructions of strongly regular Cayley graphs on abelian non \(p\)-groups. (English) Zbl 1471.05121 J. Comb. Theory, Ser. A 184, Article ID 105514, 20 p. (2021). MSC: 05E30 05C25 05B20 05B10 51E30 PDFBibTeX XMLCite \textit{K. Momihara}, J. Comb. Theory, Ser. A 184, Article ID 105514, 20 p. (2021; Zbl 1471.05121) Full Text: DOI arXiv
Leung, Ka Hin; Momihara, Koji; Xiang, Qing A new family of Hadamard matrices of order \(4 (2 q^2+1)\). (English) Zbl 1464.05029 Discrete Math. 344, No. 1, Article ID 112163, 9 p. (2021). Reviewer: Peter Kostolányi (Bratislava) MSC: 05B20 05B10 PDFBibTeX XMLCite \textit{K. H. Leung} et al., Discrete Math. 344, No. 1, Article ID 112163, 9 p. (2021; Zbl 1464.05029) Full Text: DOI arXiv
Leung, Ka Hin; Momihara, Koji New constructions of Hadamard matrices. (English) Zbl 1433.05059 J. Comb. Theory, Ser. A 171, Article ID 105160, 24 p. (2020). MSC: 05B20 05B10 PDFBibTeX XMLCite \textit{K. H. Leung} and \textit{K. Momihara}, J. Comb. Theory, Ser. A 171, Article ID 105160, 24 p. (2020; Zbl 1433.05059) Full Text: DOI arXiv
Hirasaka, Mitsugu; Momihara, Koji; Suda, Sho A new approach to the excess problem of Hadamard matrices. (English) Zbl 1401.05054 Algebr. Comb. 1, No. 5, 697-722 (2018). MSC: 05B20 05B05 05E30 11T22 11T24 PDFBibTeX XMLCite \textit{M. Hirasaka} et al., Algebr. Comb. 1, No. 5, 697--722 (2018; Zbl 1401.05054) Full Text: DOI
Momihara, Koji; Yamada, Mieko Divisible difference families from Galois rings \(\mathrm{GR}(4,n)\) and Hadamard matrices. (English) Zbl 1297.05043 Des. Codes Cryptography 73, No. 3, 897-909 (2014). MSC: 05B20 05B05 05B10 15B34 PDFBibTeX XMLCite \textit{K. Momihara} and \textit{M. Yamada}, Des. Codes Cryptography 73, No. 3, 897--909 (2014; Zbl 1297.05043) Full Text: DOI arXiv
Momihara, Koji Constructions of optical orthogonal codes based on cyclic \(t\)-wise quasi-difference matrices. (English) Zbl 1418.05042 J. Stat. Theory Pract. 6, No. 1, 48-68 (2012). MSC: 05B20 05B40 PDFBibTeX XMLCite \textit{K. Momihara}, J. Stat. Theory Pract. 6, No. 1, 48--68 (2012; Zbl 1418.05042) Full Text: DOI