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Found 209 Documents (Results 1–100)

Decomposing a matrix into two submatrices with extremely small operator norm. (English. Russian original) Zbl 1447.15021

Math. Notes 108, No. 1, 137-141 (2020); translation from Mat. Zametki 108, No. 1, 153-157 (2020); erratum Math. Notes 112, No. 6, 1077 (2022).
MSC:  15A60 47A30
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On the number of cyclic subgroups of prime order in the group of diagonal matrices over a cyclotomic field. (English. Russian original) Zbl 1484.20085

Math. Notes 107, No. 3, 534-535 (2020); translation from Mat. Zametki 107, No. 3, 479-480 (2020).
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Solving systems of linear equations with normal coefficient matrices and the degree of the minimal polyanalytic polynomial. (English. Russian original) Zbl 1404.15005

Math. Notes 104, No. 1, 48-52 (2018); translation from Mat. Zametki 104, No. 1, 56-61 (2018).
MSC:  15A06 15B57
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Representation of real normal \((T + H)\) matrices in the case where the skew-symmetric parts of both summands are skew-circulant matrices. (English. Russian original) Zbl 1328.15040

Math. Notes 98, No. 2, 289-300 (2015); translation from Mat. Zametki 98, No. 2, 258-270 (2015).
MSC:  15B05
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On an extremal property of normal matrices. (English. Russian original) Zbl 1320.15035

Math. Notes 97, No. 1, 57-62 (2015); translation from Mat. Zametki 97, No. 1, 67-73 (2015); erratum Math. Notes 98, No. 4, 704 (2015); translation from Mat. Zametki 98, No. 4, 640 (2015).
MSC:  15B57 41A05
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\(p(x)\)-circulants over finite fields and probability methods of their construction. (English. Russian original) Zbl 1321.15050

Math. Notes 96, No. 5, 928-942 (2014); translation from Mat. Zametki 96, No. 6, 864-879 (2014).
MSC:  15B33 65F30 65Y20 15A15 15A09
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Representation of real normal \((T+H)\) matrices in the case where the skew-symmetric parts of both summands are circulant matrices. (English. Russian original) Zbl 1317.15026

Math. Notes 96, No. 2, 275-285 (2014); translation from Mat. Zametki 96, No. 2, 294-305 (2014).
MSC:  15B05
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A matrix-based measure of inter-node walk relatedness in a network. (English. Russian original) Zbl 1181.15040

Math. Notes 85, No. 1, 109-119 (2009); translation from Mat. Zametki 85, No. 1, 119-130 (2009).
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Family of quaternion norms with isometry group \(\mathbb Z_{2}\) in general position. (English. Russian original) Zbl 1181.15021

Math. Notes 86, No. 2, 282-285 (2009); translation from Mat. Zametki 86, No. 2, 310-313 (2009).
MSC:  15B33 15A60
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On the asymptotics of the rows of the Padé table of analytic functions with logarithmic branch points. (English. Russian original) Zbl 1159.41005

Math. Notes 84, No. 3, 379-388 (2008); translation from Mat. Zametki 84, No. 3, 409-419 (2008).
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On the exact solution of the four-row matrix corresponding to the variational equations for ultrasecond quantization problems. (English) Zbl 1192.81127

Math. Notes 83, No. 2, 274-278 (2008); translation from Mat. Zametki 83, No. 2, 305-309 (2008).
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