Results 21 to 30 of about 134,477 (247)

On the Fučík spectrum with indefinite weights

open access: yesDifferential and Integral Equations, 2001
19 pages, to appear in Diff.
Gossez, Jean-Pierre, Alif, Mohssine
openaire   +4 more sources

The Riesz basis property of an indefinite Sturm-Liouville problem with non-separated boundary conditions [PDF]

open access: yes, 2013
We consider a regular indefinite Sturm-Liouville eigenvalue problem \{$-f" + q f = \lambda r f$} on $[a,b]$ subject to general self-adjoint boundary conditions and with a weight function $r$ which changes its sign at finitely many, so-called turning ...
Fleige, Andreas   +2 more
core   +3 more sources

On the Steklov problem involving the p(x)-Laplacian with indefinite weight [PDF]

open access: yesOpuscula Mathematica, 2017
Under suitable assumptions, we study the existence of a weak nontrivial solution for the following Steklov problem involving the \(p(x)\)-Laplacian \[\begin{cases}\Delta_{p(x)}u=a(x)|u|^{p(x)-2}u \quad \text{in }\Omega, \\ |\nabla u|^{p(x)-2}\frac ...
Khaled Ben Ali   +2 more
doaj   +1 more source

Bifurcation from zero or infinity in nonlinearizable Sturm–Liouville problems with indefinite weight

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2021
In this paper, we consider bifurcation from zero or infinity of nontrivial solutions of the nonlinear Sturm–Liouville problem with indefinite weight. This problem is mainly important because of it is related with a selection-migration model in genetic ...
Ziyatkhan Aliyev, Leyla Nasirova
doaj   +1 more source

Indefinite theta functions and black hole partition functions [PDF]

open access: yes, 2014
We explore various aspects of supersymmetric black hole partition functions in four-dimensional toroidally compactified heterotic string theory. These functions suffer from divergences owing to the hyperbolic nature of the charge lattice in this theory ...
Cardoso, Gabriel Lopes   +3 more
core   +1 more source

Cohomology and Decomposition of Tensor Product Representations of SL(2,R) [PDF]

open access: yes, 2002
We analyze the decomposition of tensor products between infinite dimensional (unitary) and finite-dimensional (non-unitary) representations of SL(2,R). Using classical results on indefinite inner product spaces, we derive explicit decomposition formulae,
André van Tonder   +26 more
core   +4 more sources

𝑝(𝑥)-Laplacian with indefinite weight [PDF]

open access: yesProceedings of the American Mathematical Society, 2011
We consider the eigenvalue problem − div ( | ∇ u | p ( x ) − 2 ∇ u )
openaire   +1 more source

Bifurcation in nonlinearizable eigenvalue problems for ordinary differential equations of fourth order with indefinite weight

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2017
We consider a nonlinearizable eigenvalue problem for the beam equation with an indefinite weight function. We investigate the structure of bifurcation set and study the behavior of connected components of the solution set bifurcating from the line of ...
Ziyatkhan Aliyev, Rada Huseynova
doaj   +1 more source

Multiple positive solutions to elliptic boundary blow-up problems [PDF]

open access: yes, 2016
We prove the existence of multiple positive radial solutions to the sign-indefinite elliptic boundary blow-up problem \[ \left\{\begin{array}{ll} \Delta u + \bigl(a^+(\vert x \vert) - \mu a^-(\vert x \vert)\bigr) g(u) = 0, & \; \vert x \vert < 1, \\ u(x)
Aftalion   +44 more
core   +2 more sources

Parameters of variation between verb-subject and subject-verb order in late Middle English [PDF]

open access: yes, 2007
This article sets out to clarify the contribution of syntactic properties and subject weight for variation between verb-subject and subject-verb order in a database of fourteenth and fifteenth-century prose. It sets out the syntactic structures which are
Warner, Anthony
core   +1 more source

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