Found 215 Documents (Results 1–100)

100
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On two Laplacian matrices for skew gain graphs. (English)Zbl 1468.05164

MSC:  05C50 05C22 05C76
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Automorphisms of a Clifford-like parallelism. (English)Zbl 1461.51001

MSC:  51A15 51J15
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MSC:  51A40
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Morphisms of skew Hadamard matrices. (English)Zbl 1455.15007

MSC:  15B34 05B20
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Symmetric matrices whose entries are linear functions. (English. Russian original)Zbl 1454.15023

Comput. Math. Math. Phys. 60, No. 1, 102-108 (2020); translation from Zh. Vychisl. Mat. Mat. Fiz. 60, No. 1, 109-115 (2020).
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The maximum number of columns in supersaturated designs with $$s_{\max}=2$$. (English)Zbl 1429.05025

MSC:  05B15 05B20 62K99
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Leroy, André (ed.) et al., Rings, modules and codes. Fifth international conference on noncommutative rings and their applications, University of Artois, Lens, France, June 12–15, 2017. Providence, RI: American Mathematical Society (AMS). Contemp. Math. 727, 167-176 (2019).
MSC:  16W50 16S36 16N80
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On the Smith normal form of a skew-symmetric D-optimal design of order $$n \equiv 2\pmod 4$$. (English)Zbl 1417.05022

MSC:  05B30 05B20
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Clifford-like parallelisms. (English)Zbl 1409.51002

MSC:  51A15 51J15
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Constructions of skew Hadamard difference families. (English)Zbl 1402.05017

MSC:  05B10 05B05 05B20
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MSC:  05B20

MSC:  05B20
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Hoffman’s coclique bound for normal regular digraphs, and nonsymmetric association schemes. (English)Zbl 1364.05049

Abualrub, Taher (ed.) et al., Mathematics across contemporary sciences. AUS-ICMS, American University of Sharjah, United Arab Emirates, April 2–5, 2015. Cham: Springer (ISBN 978-3-319-46309-4/hbk; 978-3-319-46310-0/ebook). Springer Proceedings in Mathematics & Statistics 190, 137-150 (2017).
MSC:  05C62 05B20 05E30
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On skew E-W matrices. (English)Zbl 1348.05038

MSC:  05B20 15B99
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Complex spherical codes with two inner products. (English)Zbl 1321.05034

MSC:  05B30 05B20
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Inner product vectors for skew-Hadamard matrices. (English)Zbl 1329.05045

Colbourn, Charles J. (ed.), Algebraic design theory and Hadamard matrices. ADTHM, Lethbridge, Alberta, Canada, July 8–11, 2014. Selected papers based on the presentations at the workshop and at the workshop on algebraic design theory with Hadamard matrices: applications, current trends and future directions, Banff International Research Station, Alberta, Canada, July 11–13, 2014. Cham: Springer (ISBN 978-3-319-17728-1/hbk; 978-3-319-17729-8/ebook). Springer Proceedings in Mathematics & Statistics 133, 171-187 (2015).
MSC:  05B20 15B35
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On good matrices and skew Hadamard matrices. (English)Zbl 1329.05038

Colbourn, Charles J. (ed.), Algebraic design theory and Hadamard matrices. ADTHM, Lethbridge, Alberta, Canada, July 8–11, 2014. Selected papers based on the presentations at the workshop and at the workshop on algebraic design theory with Hadamard matrices: applications, current trends and future directions, Banff International Research Station, Alberta, Canada, July 11–13, 2014. Cham: Springer (ISBN 978-3-319-17728-1/hbk; 978-3-319-17729-8/ebook). Springer Proceedings in Mathematics & Statistics 133, 13-28 (2015).
MSC:  05B20
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On $$(-1,1)$$-matrices of skew type with the maximal determinant and tournaments. (English)Zbl 1329.05037

Colbourn, Charles J. (ed.), Algebraic design theory and Hadamard matrices. ADTHM, Lethbridge, Alberta, Canada, July 8–11, 2014. Selected papers based on the presentations at the workshop and at the workshop on algebraic design theory with Hadamard matrices: applications, current trends and future directions, Banff International Research Station, Alberta, Canada, July 11–13, 2014. Cham: Springer (ISBN 978-3-319-17728-1/hbk; 978-3-319-17729-8/ebook). Springer Proceedings in Mathematics & Statistics 133, 1-11 (2015).
MSC:  05B20 15B34
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Linear algebra and matrices. Topics for a second course. (English)Zbl 1334.15002

Pure and Applied Undergraduate Texts 24. Providence, RI: American Mathematical Society (AMS) (ISBN 978-1-4704-1852-6/hbk). xv, 317 p. (2015).

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Determinants of $$(-1,1)$$-matrices of the skew-symmetric type: a cocyclic approach. (English)Zbl 1307.05031

MSC:  05B20 15A15
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Havliček-Tietze configurations in various projective planes. (English)Zbl 1307.51002

MSC:  51A20 51A30 51E15 12F05 12Y05
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The collineations which act as addition and multiplication on points in a certain class of projective Klingenberg planes. (English)Zbl 1284.51006

MSC:  51C05 51J10 12E15
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The impact of number theory and computer-aided mathematics on solving the Hadamard matrix conjecture. (English)Zbl 1279.05008

Borwein, Jonathan M. (ed.) et al., Number theory and related fields. In memory of Alf van der Poorten. Based on the proceedings of the international number theory conference, Newcastle, Australia, March 12–16, 2012. New York, NY: Springer (ISBN 978-1-4614-6641-3/hbk; 978-1-4614-6642-0/ebook). Springer Proceedings in Mathematics & Statistics 43, 313-320 (2013).
MSC:  05B20 11C20 20B20
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Matrix theory. (English)Zbl 1275.15001

Graduate Studies in Mathematics 147. Providence, RI: American Mathematical Society (AMS) (ISBN 978-0-8218-9491-0/hbk). x, 253 p. (2013).

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Difference sets and doubly transitive actions on Hadamard matrices. (English)Zbl 1242.05038

MSC:  05B10 05B20
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Matrices with restricted entries and $$q$$-analogues of permutations. (English)Zbl 1247.05027

MSC:  05A30 05B20
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MSC:  05B20
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MSC:  05B20
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Linearly small elation quadrangles. (English)Zbl 1189.51003

MSC:  51E12 51A10 51A50
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On angles and distances between subspaces. (English)Zbl 1177.15024

MSC:  15A60 15B57 15A18
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On constants in the Füredi-Hajnal and the Stanley-Wilf conjecture. (English)Zbl 1193.05005

MSC:  05A05 05B20 15B57
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Skew Hadamard designs and their codes. (English)Zbl 1179.05024

MSC:  05B20 94B25
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MSC:  05B20
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MSC:  05B20

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On the automorphisms of Paley’s type II Hadamard matrix. (English)Zbl 1189.05037

MSC:  05B20 20B25 15B57
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MSC:  05B20 62K05
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Ranks of Hadamard matrices and equivalence of Sylvester-Hadamard and pseudo-noise matrices. (English)Zbl 1136.15016

Ball, Joseph A. (ed.) et al., Recent advances in matrix and operator theory. Proceedings of the 16th international workshop on operator theory and applications, IWOTA, Storrs, CT, USA, 2005. Basel: Birkhäuser (ISBN 978-3-7643-8538-5/hbk). Operator Theory: Advances and Applications 179, 35-46 (2008).

Analytical formulas for minors of orthogonal designs and an application. (English)Zbl 1177.65067

Păltineanu, Gavriil (ed.) et al., Trends and challenges in applied mathematics. Conference proceedings of the international conference, ICTCAM 2007, Bucharest, Romania, June 20–23, 2007. Bucharest: Matrix Rom (ISBN 978-973-755-283-9/pbk). 237-240 (2007).

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Spindle-configurations of skew lines. (English)Zbl 1152.51001

MSC:  51A20 05B30 57M25 57Q37 57M27 52C30 55R80
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MSC:  78A45
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Determination of all possible orders of weight 16 circulant weighing matrices. (English)Zbl 1218.15019

MSC:  15B57 05B20
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Circulant weighing matrices of weight $$2^{2t}$$. (English)Zbl 1200.05042

MSC:  05B20 05B10 15B57
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Full sign pattern matrices that allow idempotency with rank $$k$$. (English)Zbl 1112.15026

MSC:  15B57 15A03 05B20

The number of zeros of a tight sign-central matrix. (English)Zbl 1084.15020

MSC:  15B57 15A06 05B20
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Construction of new skew Hadamard matrices and their use in screening experiments. (English)Zbl 1429.62350

MSC:  62K15 05B20
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Determinants of matrices associated with incidence functions on posets. (English)Zbl 1080.11023

MSC:  11C20 15B57
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Antipodal $$n$$-gons inscribed in a regular $$(2n - 1)$$-gon and half-circulant Hadamard matrices of order $$4n$$. (Russian. English summary)Zbl 1072.05015

MSC:  05B20 15B57

Normal form of skew-symmetric matrices and orders of pseudo-symplectic groups over $$\mathbb Z/2^k\mathbb Z$$. (Chinese. English summary)Zbl 1069.05015

MSC:  05B20 15B57 20G35

Cocyclic function on Jacket matrices. (English)Zbl 1063.65597

MSC:  65T50 15B57 05B20

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New skew-Hadamard matrices of order $$4\cdot 59$$ and new $$D$$-optimal designs of order $$2\cdot 59$$. (English)Zbl 1054.62081

MSC:  62K05 05B20
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Line-hyperline pairs of projective spaces and fundamental subgroups of linear groups. (English)Zbl 1046.51001

MSC:  51A05 51D25 12E15
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About some classes $$VW$$- planes. (Russian)Zbl 1109.51300

MSC:  51A20 12E15

Construction and normality of the Kronecker product of Hadamard matrices. (Chinese. English summary)Zbl 1049.05505

MSC:  05B20 15B57

On embeddability of uniformly valued ternary fields in Hahn ternary fields. (Zur Einbettung uniform bewerteter Ternärkörper in Hahn-Ternärkörper.) (German)Zbl 1054.51001

MSC:  51A25 13F25 12K99
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On good matrices, skew Hadamard matrices and optimal designs. (English)Zbl 1011.62075

MSC:  62K05 05B20
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Irreducible powerful ray pattern matrices. (English)Zbl 0994.15026

MSC:  15B57 15B48 05B20
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The permutations $$123p_4\dots p_m$$ and $$321p_4\dots p_m$$ are Wilf-equivalent. (English)Zbl 0988.05008

MSC:  05A05 05B20 15B57
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Hankel matrices in combinatorial sequence analysis. (English)Zbl 1002.15023

MSC:  15B57 15A15 05B20

Permutations matrix. (English)Zbl 0970.05004

MSC:  05A05 05B20 15B57
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