Some remarks on solving systems of linear equations by a relaxation method combined with a generalized Hotelling method for inverting matrices
K. Florek (1965)
Applicationes Mathematicae
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K. Florek (1965)
Applicationes Mathematicae
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Bebiano, Natalia, da Providência, Joao, Nata, Ana Cristina, Pereira Soares, Maria da Graca (2008)
ELA. The Electronic Journal of Linear Algebra [electronic only]
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S. Kouachi (2008)
Applicationes Mathematicae
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We give explicit expressions for the eigenvalues and eigenvectors of some tridiagonal matrices with non-constant diagonal entries. Our techniques are based on the theory of recurrent sequences.
Natália Bebiano, Susana Furtado (2021)
Czechoslovak Mathematical Journal
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We identify new classes of structured matrices whose numerical range is of the elliptical type, that is, an elliptical disk or the convex hull of elliptical disks.
J. GREENSTADT (1962/63)
Numerische Mathematik
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Mohammed Al-Dolat, Khaldoun Al-Zoubi, Mohammed Ali, Feras Bani-Ahmad (2016)
Open Mathematics
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H. Hanani, E. Netanyahu, M. Reichaw (1968)
Colloquium Mathematicae
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Jaćimovski, S.K., Ilić, D.I., Junger, I.K., Šetrajčić, J.P. (2001)
Novi Sad Journal of Mathematics
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Omar Hirzallah, Fuad Kittaneh, Khalid Shebrawi (2012)
Studia Mathematica
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We derive several numerical radius inequalities for 2 × 2 operator matrices. Numerical radius inequalities for sums and products of operators are given. Applications of our inequalities are also provided.
Wen Yan, Jicheng Tao, Zhao Lu (2016)
Special Matrices
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In this paper we studied the classical numerical range of matrices in sp(2n, C). We obtained some result on the relationship between the numerical range of a matrix in and that [...] of its diagonal block, the singular values of its off-diagonal block A2.
Jiří Sedláček, Antonín Vrba (1986)
Czechoslovak Mathematical Journal
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