Numerical application of the mathematical spectra to the problem of eigenvalues of matrices
K. Orlov (1971)
Matematički Vesnik
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K. Orlov (1971)
Matematički Vesnik
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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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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.
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.
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.
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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Cheng-yi Zhang, Zichen Xue, Shuanghua Luo (2016)
Open Mathematics
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It is well known that SOR iterative methods are convergent for linear systems, whose coefficient matrices are strictly or irreducibly diagonally dominant matrices and strong H-matrices (whose comparison matrices are nonsingular M-matrices). However, the same can not be true in case of those iterative methods for linear systems with weak H-matrices (whose comparison matrices are singular M-matrices). This paper proposes some necessary and sufficient conditions such that SOR iterative...
Z. Kowalski (1963)
Annales Polonici Mathematici
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H. Schneider, B.D. Saunders (1976)
Numerische Mathematik
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Đ. Kurepa (1952)
Matematički Vesnik
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Anita Dobek (2008)
Discussiones Mathematicae Probability and Statistics
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E. Cancès, S. Labbé (2012)
ESAIM: Proceedings
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Paulus Gerdes (2002)
Visual Mathematics
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