Results 221 to 230 of about 134,477 (247)
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Second cumulant statistical control with indefinite control weight
2008 47th IEEE Conference on Decision and Control, 2008In linear-quadratic-Gaussian control, the positive definiteness of the control weighting matrix in the cost function has been assumed, however, it has been shown that solutions do exist for indefinite control weight matrices for the linear-quadratic-Gaussian case.
Chang-Hee Won +2 more
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Sturm–Liouville problems with indefinite weights and Everitt's inequality
Proceedings of the Royal Society of Edinburgh: Section A Mathematics, 1996It is shown that spectral properties of Sturm–Liouville eigenvalue problems with indefinite weights are related to integral inequalities studied by Everitt. A result of Beals on indefinite problems leads to a sufficient condition for the validity of such an inequality.
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A weighting method for 0–1 indefinite quadratic bilevel programming
Operational Research, 2010zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Arora, S. R., Arora, Ritu
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Periodic-parabolic eigenvalue problems with indefinite weight functions
Archiv der Mathematik, 1997The author proves an existence and uniqueness result for the positive principal eigenvalue of a periodic-parabolic equation with \(L_\infty\) coefficients and indefinite weight. He also establishes a result on the stability of the principal positive eigenvalue with respect to the perturbations.
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Generalized principal eigenvalues for indefinite-weight elliptic problems
Comptes Rendus de l'Académie des Sciences - Series I - Mathematics, 1998Summary: We prove a necessary and a sufficient condition for the existence of a positive solution of the equation \((P-\mu W)u=0\) in \(\Omega\), where \(P\) is a critical, second-order, linear elliptic operator which is defined on a subdomain \(\Omega\) of a noncompact Riemannian manifold \(X\). It is assumed that \(W\in C^\alpha(\Omega)\) is a ``weak'
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ANTI-MAXIMUM PRINCIPLES FOR INDEFINITE-WEIGHT ELLIPTIC PROBLEMS
Communications in Partial Differential Equations, 2001This paper is concerned with anti-maximum principles (AMPs) for indefinite-weight elliptic problems.
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An elliptic boundary problem involving an indefinite weight
Proceedings of the Royal Society of Edinburgh: Section A Mathematics, 2000The spectral theory for non-self-adjoint elliptic boundary problems involving an indefinite weight function has only been established for the case of higher-order operators under the assumption that the reciprocal of the weight function is essentially bounded.
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A linear eigenvalue problem with indefinite weight function
Archiv der Mathematik, 1993The author considers the linear eigenvalue problem \[ -\Delta u(x) = \lambda g(x) u(x) \text{ in } \mathbb{R}^ N,\;u(x) \to 0 \text{ as } | x | \to \infty, \tag{1} \] where \(N \geq 3\), \(\Delta\) denotes the Laplacian and \(g\) is a real-valued function which changes sign.
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On Principal Eigenvalues for Indefinite-Weight Elliptic Problems
1998Consider the quantum mechanical system H μ=−Δ−μV in ℝd where μ ∈ ℝ is a spectral parameter and V ∈ C 0 ∞ (ℝd). It is well known that for d ≥ 3, the Schrodinger operator Hμ has no bound states provided that |μ| is sufficiently small. On the other hand, for d = 1, 2, B.
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Global patterns in excess body weight and the associated cancer burden
Ca-A Cancer Journal for Clinicians, 2019Hyuna Sung +2 more
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