Results 1 to 10 of about 180,050 (282)
A recursive condition for the symmetric nonnegative inverse eigenvalue problem
Revista Integración, 2017 In this paper we present a sufficient ondition and a necessary condition for Symmetri Nonnegative Inverse Eigenvalue Problem. This condition is independent of the existing realizability criteria.
Elvis Ronald Valero +2 more
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Linear Algebra and its Applications, 1977 In this paper the author describes two general methods to solve various inverse eigenvalue problems (i.e.p.). The first method is to state an i.e.p. as a system of polynomial equations. By rediscovering the non-linear alternative due to \textit{E. Noether} and \textit{B. L. van der Waerden} [Nachrichten der Gesellschaft der Wissenschaften zu Göttingen,
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Inverse Eigenvalue Problems for Singular Rank One Perturbations of a Sturm-Liouville Operator
Advances in Mathematical Physics, 2021 This paper is concerned with the inverse eigenvalue problem for singular rank one perturbations of a Sturm-Liouville operator. We determine uniquely the potential function from the spectra of the Sturm-Liouville operator and its rank one perturbations.
Xuewen Wu
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Solution of the Dirichlet boundary value problem for the Sine-Gordon equation [PDF]
, 2002 The sine-Gordon equation in light cone coordinates is solved when Dirichlet conditions on the L-shape boundaries of the strip [0,T]X[0,infinity) are prescribed in a class of functions that vanish (mod 2 pi) for large x at initial time.
Ablowitz +15 more
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Perron Spectratopes and the Real Nonnegative Inverse Eigenvalue Problem
, 2015 Call an $n$-by-$n$ invertible matrix $S$ a \emph{Perron similarity} if there is a real non-scalar diagonal matrix $D$ such that $S D S^{-1}$ is entrywise nonnegative.
Johnson, Charles R., Paparella, Pietro
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The inverse eigenvalue problem for quantum channels [PDF]
, 2010 Given a list of n complex numbers, when can it be the spectrum of a quantum channel, i.e., a completely positive trace preserving map? We provide an explicit solution for the n=4 case and show that in general the characterization of the non-zero part of ...
Perez-Garcia, David, Wolf, Michael M.
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Bethe ansatz for the SU(4) extension of the Hubbard Model
, 1999 We apply the nested algebraic Bethe ansatz method to solve the eigenvalue problem for the SU(4) extension of the Hubbard model. The Hamiltonian is equivalent to the SU(4) graded permutation operator. The graded Yang-Baxter equation and the graded Quantum
Anderson P. W. +16 more
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Solving inverse cone-constrained eigenvalue problems
Numerische Mathematik, 2012 We compare various algorithms for constructing a matrix of order n whose Pareto spectrum contains a prescribed set = {λ 1 ,. .. , λ p } of reals. In order to avoid overdetermination one assumes that p does not exceed n 2. The inverse Pareto eigenvalue problem under consideration is formulated as an underdetermined system of nonlinear equations. We also
Gajardo, Pedro, Seeger, Alberto
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Explicit solution for an infinite dimensional generalized inverse eigenvalue problem
International Journal of Mathematics and Mathematical Sciences, 2001 We study a generalized inverse eigenvalue problem (GIEP), Ax=λBx, in which A is a semi-infinite Jacobi matrix with positive off-diagonal entries ci>0, and B= diag (b0,b1,…), where bi≠0 for i=0,1,….
Kazem Ghanbari
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Advances in Difference Equations, 2020 We provide an effective finite element method to solve the Schrödinger eigenvalue problem with an inverse potential on a spherical domain. To overcome the difficulties caused by the singularities of coefficients, we introduce spherical coordinate ...
Yubing Sui +3 more
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