Results 31 to 40 of about 134,477 (247)
Advanced Nonlinear Studies, 2019 Efficient conditions guaranteeing the existence and multiplicity of T-periodic solutions to the second order differential equation u′′=h(t)g(u){u^{\prime\prime}=h(t)g(u)} are established.
Hakl Robert, Zamora Manuel
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On the fourth-order Leray–Lions problem with indefinite weight and nonstandard growth conditions
Bulletin of Mathematical Sciences, 2022 We prove the existence of at least three weak solutions for the fourth-order problem with indefinite weight involving the Leray–Lions operator with nonstandard growth conditions.
K. Kefi +3 more
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Degenerate Elliptic Eigenvalue Problems with Indefinite Weights [PDF]
Mediterranean Journal of Mathematics, 2008 The purpose of this paper is to provide a careful and accessible exposition of the Kreĭn and Rutman Theory of degenerate elliptic eigenvalue problems with indefinite weights that model population dynamics in environments with spatial heterogeneity.
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A Lyapunov type inequality for indefinite weights and eigenvalue homogenization [PDF]
Proceedings of the American Mathematical Society, 2015 12 ...
Salort, Ariel Martin +2 more
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, 2009 Eigenvalues in the essential spectrum of a weighted Sturm-Liouville operator are studied under the assumption that the weight function has one turning point.
A. Fleige +49 more
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On positive solutions of second-order delayed differential system with indefinite weight
Boundary Value Problems, 2021 In this paper, we study the existence of positive solutions of a second-order delayed differential system, in which the weight functions may change sign. To prove our main results, we apply Krasnosel’skii’s fixed point theorems in cones.
Fanglei Wang, Ran Ding
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On indefinite modular forms of weight one
Journal of the Mathematical Society of Japan, 1986 Let us suppose that the ring class field \(N_ f\) modulo f (f\(\in {\mathbb{N}})\) of an imaginary quadratic field \(\Sigma\) is a dihedral extension over \({\mathbb{Q}}\) with Galois group \(D_ 4\). Let K be the unique real quadratic subfield of \(N_ f\).
HIRAMATSU, Toyokazu +2 more
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Homogenization of Steklov spectral problems with indefinite density function in perforated domains
, 2012 The asymptotic behavior of second order self-adjoint elliptic Steklov eigenvalue problems with periodic rapidly oscillating coefficients and with indefinite (sign-changing) density function is investigated in periodically perforated domains.
Douanla, Hermann Yonta
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Bounds on the non-real spectrum of differential operators with indefinite weights [PDF]
, 2012 Ordinary and partial differential operators with an indefinite weight function can be viewed as bounded perturbations of non-negative operators in Krein spaces.
Behrndt, Jussi +2 more
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Infinite-dimensional representations of the rotation group and Dirac's monopole problem
, 2005 Within the context of infinite-dimensional representations of the rotation group the Dirac monopole problem is studied in details. Irreducible infinite-dimensional representations, being realized in the indefinite metric Hilbert space, are given by ...
Barrera-Rivera, K.A. +5 more
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