Results 91 to 100 of about 3,534,316 (293)
Spectrum of a Class of Difference Operators with Indefinite Weights
Journal of Applied Mathematics and Physics, 2020 In this study, we use analytical methods and Sylvester inertia theorem to research a class of second order difference operators with indefinite weights and coupled boundary conditions. The eigenvalue problem with sign-changing weight has lasted a long time.
Congmin Yang, Kang Sun, Yunlan Gao
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Polymer International, EarlyView.An overview and categorization of man‐made per‐ or polyfluoroalkyl substances (PFASs) including low‐molar‐mass and high‐molar‐mass fluorochemicals, and their international regulations is presented. Though certain PFASs are toxic, bioaccumulative and cross the human cellular membranes, others, such as fluoropolymers, are safe, reliable and involved in ...
Bruno Améduri
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Steklov problem with an indefinite weight for the p-Laplacian
Electronic Journal of Differential Equations, 2005 Let $Omegasubsetmathbb{R}^{N}$, with $Ngeq2$, be a Lipschitz domain and let 1 lees than p less than $infty$. We consider the eigenvalue problem $Delta_{p}u=0$ in $Omega$ and $| abla u|^{p-2}frac{partial u}{partial u}=lambda m|u|^{p-2}u$ on $partialOmega$
Olaf Torne
doaj
Some remarks on an eigenvalue problem for an anisotropic elliptic equation with indefinite weight
Filomat, 2019 In this paper, we consider an eigenvalue problem for an anisotropic elliptic equation with indefinite weight, in which the differential operator involves partial derivatives with different variable exponents.
Nguyen Chung Thanh
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Singular Sturm?Liouville problems with nonnegative and indefinite weights
Monatshefte f�r Mathematik, 1984 This article is concerned with the oscillatory properties of the eigenfunctions of a class of singular Sturm-Liouville problems \(- (py')'+qy=\lambda wy\) on (a,b), where the weight function w vanishes on a subinterval of positive measure, or where the weight function w changes sign on (a,b).
Kaper, H.G., Kwong, M.K., Zettl, A.
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Can ensemble‐based parameter estimation aid parameterization design?
Quarterly Journal of the Royal Meteorological Society, EarlyView.Parameterization schemes rely on uncertain empirical parameters, the values of which can be estimated objectively and iteratively with ensemble data assimilation methods. Since all sources of forecast error in the background ensemble project onto parameter adjustments, the estimated parameters may converge to implausible values or not converge at all ...
Stefano Serafin, Martin Weissmann
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Multi‐Objective Robust Controller Synthesis With Integral Quadratic Constraints in Discrete‐Time
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT This article presents a novel framework for the robust controller synthesis problem in discrete‐time systems using dynamic Integral Quadratic Constraints (IQCs). We present an algorithm to minimize closed‐loop performance measures such as the ℋ∞$$ {\mathscr{H}}_{\infty } $$‐norm, the energy‐to‐peak gain, the peak‐to‐peak gain, or a ...
Lukas Schwenkel +4 more
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Riesz Bases of Root Vectors of Indefinite Sturm-Liouville problems with eigenparameter dependent boundary conditions, I [PDF]
, 2007 We consider a regular indefinite Sturm-Liouville problem with two self-adjoint boundary conditions, one being affinely dependent on the eigenparameter.
Binding, Paul, Ćurgus, Branko
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Towards a Sustainable Future: Addressing Climate Change and Promoting Sustainable Development
Sustainable Development, EarlyView.ABSTRACT This study aims to analyze policy research and global agreements on the decarbonization of economic development. Climate change and economic development are separate and equal, and strategies should separate responsibility from action. This will be required beyond the Kyoto and Paris agreements.
Woo‐Sik Sohn
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Non-real eigenvalues of symmetric Sturm–Liouville problems with indefinite weight functions
Electronic Journal of Qualitative Theory of Differential Equations, 2017 The present paper deals with non-real eigenvalues of regular Sturm–Liouville problems with odd symmetry indefinite weight functions applying the two-parameter method.
Bing Xie, huaqing Sun, Xinwei Guo
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