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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Existence Result for a Class of Elliptic Systems with Indefinite Weights in R2 [PDF]
Boundary Value Problems, 2008 We obtain the existence of a nontrivial solution for a class of subcritical elliptic systems with indefinite weights in R2. The proofs base on Trudinger-Moser inequality and a generalized linking theorem introduced by Kryszewski and Szulkin.
Sanyang Liu, Guoqing Zhang
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Multiplicity results for asymmetric boundary value problems with indefinite weights [PDF]
Abstract and Applied Analysis, 2004 We prove existence and multiplicity of solutions, with prescribed nodal properties, to a boundary value problem of the form u″+f(t,u)=0, u(0)=u(T)=0.
Francesca Dalbono
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Bifurcation beyond the principal eigenvalues for Neumann problems with indefi-nite weights [PDF]
Advances in Pure and Applied Mathematics, 2023 This paper is devoted to the study of the effects of indefinite weights on some following nonlinear Neumann problems. Our results establish a relation between the position of a parameter and the number of nontrivial classical solutions of these problems.
Marta Calanchi, Bernhard Ruf
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Existence of solutions for critical fractional p-Laplacian equations with indefinite weights
Electronic Journal of Differential Equations, 2021 This article concerns the critical fractional p-Laplacian equation with indefinite weights (-Δp)su = λg(x)|u|p-2 u + h(x)|u|p*s-2u in ℝN, where 0 < s < 1 < p < ∞, N > sp and p*s = Np/(N - sp), the weight functions g may be indefinite, and ...
Na Cui, Hong-Rui Sun
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The development of the indefinite article in Medieval and Golden-Age Spanish [PDF]
, 2010 PhDUnitary cardinals are a common source for indefinite markers. This thesis is a quantitative diachronic study of the development of Spanish un, from its cardinal value to its use as an indefi nite article. Based on a corpus comprising texts from the
Pozas-Loyo, Julia
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On Indefinite Sums Weighted by Periodic Sequences [PDF]
Results in Mathematics, 2019 For any integer $q\geq 2$ we provide a formula to express indefinite sums of a sequence $(f(n))_{n\geq 0}$ weighted by $q$-periodic sequences in terms of indefinite sums of sequences $(f(qn+p))_{n\geq 0}$, where $p\in\{0,\ldots,q-1\}$. When explicit expressions for the latter sums are available, this formula immediately provides explicit expressions ...
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Optimized Statistical Beamforming for Cooperative Spectrum Sensing in Cognitive Radio Networks
Mathematics, 2023 In cognitive radio (CR), cooperative spectrum sensing (CSS) employs a fusion of multiple decisions from various secondary user (SU) nodes at a central fusion center (FC) to detect spectral holes not utilized by the primary user (PU). The energy detector (
Ubaid M. Al-Saggaf +3 more
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Principal Eigenvalues with Indefinite Weight Functions [PDF]
Transactions of the American Mathematical Society, 1997 Both existence and non-existence results for principal eigenvalues of an elliptic operator with indefinite weight function have been proved. The existence of a continuous family of principal eigenvalues is demonstrated.
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Elliptic problems involving an indefinite weight [PDF]
Transactions of the American Mathematical Society, 1990 We consider a selfadjoint elliptic eigenvalue problem, which is derived formally from a variational problem, of the form L u =
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