Shapes and computer generation of numerical ranges of Krein space operators.
Li, Chi-Kwong, Rodman, Leiba (1998)
ELA. The Electronic Journal of Linear Algebra [electronic only]
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Li, Chi-Kwong, Rodman, Leiba (1998)
ELA. The Electronic Journal of Linear Algebra [electronic only]
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Henrion, Didier (2010)
ELA. The Electronic Journal of Linear Algebra [electronic only]
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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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Chien, Mao-Ting, Neumann, Michel (1998)
ELA. The Electronic Journal of Linear Algebra [electronic only]
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Natalia Bebiano, J. da Providência, A. Nata, J.P. da Providência (2015)
Open Mathematics
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Consider the Hilbert space (H,〈• , •〉) equipped with the indefinite inner product[u,v]=v*J u,u,v∈ H, where J is an indefinite self-adjoint involution acting on H. The Krein space numerical range WJ(T) of an operator T acting on H is the set of all the values attained by the quadratic form [Tu,u], with u ∈H satisfying [u,u]=± 1. We develop, implement and test an alternative algorithm to compute WJ(T) in the finite dimensional case, constructing 2 by 2 matrix compressions of T and their...
Chorianopoulos, Christos, Psarrakos, Panayiotis, Uhlig, Frank (2010)
ELA. The Electronic Journal of Linear Algebra [electronic only]
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Psarrakos, P.J., Tsatsomeros, M.J. (2000)
ELA. The Electronic Journal of Linear Algebra [electronic only]
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Bolotnikov, Vladimir, Li, Chi-Kwong, Meade, Patrick R., Mehl, Christian, Rodman, Leiba (2002)
ELA. The Electronic Journal of Linear Algebra [electronic only]
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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.
Abdollahi, Abdolaziz, Heydari, Mohammad Taghi (2011)
International Journal of Mathematics and Mathematical Sciences
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Adam, Maria, Tsatsomeros, Michael J. (2006)
ELA. The Electronic Journal of Linear Algebra [electronic only]
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Michal Zajac (1978)
Mathematica Slovaca
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