Results 41 to 50 of about 3,779,631 (328)

On a Robin (p,q)-equation with a logistic reaction [PDF]

Opuscula Mathematica, 2019
We consider a nonlinear nonhomogeneous Robin equation driven by the sum of a \(p\)-Laplacian and of a \(q\)-Laplacian (\((p,q)\)-equation) plus an indefinite potential term and a parametric reaction of logistic type (superdiffusive case).
Nikolaos S. Papageorgiou, Calogero Vetro, Francesca Vetro   +2 more
doaj   +1 more source

Positive solutions of the diophantine equation

International Journal of Mathematics and Mathematical Sciences, 1981
Integral solutions of x3 + λy + 1 − xyz = 0 are observed for all integral λ. For λ = 2 the 13 solutions of the equation in positive integers are determined. Solutions of the equation in positive integers were previously determined for the case λ = 1.
openaire   +3 more sources

Biophysical analysis of angiotensin II and amyloid‐β cross‐interaction in aggregation and membrane disruption

FEBS Letters, EarlyView.
Angiotensin II (AngII), a neuropeptide, interacts with amyloid‐β (Aβ), a key player in Alzheimer's disease. This study reveals that AngII reduces Aβ aggregation and membrane disruption in vitro. Biophysical assays and molecular modeling suggest AngII binds disordered Aβ forms, potentially modulating early amyloidogenic events and contributing to ...
Mohsen Habibnia, Eric Catalina‐Hernandez, Maialen Cabrerizo‐Idiazabal, Ramon Barnadas‐Rodríguez, Mario Lopez‐Martin, Alex Peralvarez‐Marin   +5 more
wiley   +1 more source

Positive solutions to indefinite Neumann problems when the weight has positive average

, 2015
We deal with positive solutions for the Neumann boundary value problem associated with the scalar second order ODE $$ u" + q(t)g(u) = 0, \quad t \in [0, T], $$ where $g: [0, +\infty[\, \to \mathbb{R}$ is positive on $\,]0, +\infty[\,$ and $q(t)$ is an ...
A. Boscaggin, A. Boscaggin, A. Boscaggin, A. Boscaggin, Alberto Boscaggin, C. Bandle, F. V. Atkinson, G. Feltrin, H. Amann, H. Amann, H. Berestycki, H. Berestycki, J. Mawhin, Maurizio Garrione, P. H. Rabinowitz, P. Hess, S. Alama   +16 more
core   +1 more source

On positive solutions of Liouville-Gelfand problem

Вестник КазНУ. Серия математика, механика, информатика, 2018
Modern science is highly interested in processes in nonlinear media. Mathematical models of these processes are often described by boundary-value problems for nonlinear elliptic equations.
S. V. Kolosova, V. S. Lukhanin, M. V. Sidorov   +2 more
doaj   +1 more source

Positive solutions of positive linear systems

Linear Algebra and its Applications, 1985
The Volterra-Lotka equations \(dx_ i/dt=x_ i(b_ i-\Sigma a_{ij}x_ j),\) \(b_ i>0\), \(a_{ii}>0\), \(a_{ij}\geq 0\) correspond to an ecosystem with interspecies and intraspecies competition. A steady state solution \(X^*\) exists if \(b_ i-\Sigma a_{ij}X^*_ j=0\).
openaire   +1 more source

Linked dimers of the AAA+ ATPase Msp1 reveal energetic demands and mechanistic plasticity for substrate extraction from lipid bilayers

FEBS Letters, EarlyView.
Cells must clear mislocalized or faulty proteins from membranes to survive. The AAA+ ATPase Msp1 performs this task, but dissecting how its six subunits work together is challenging. We engineered linked dimers with varied numbers of functional subunits to reveal how Msp1 subunits cooperate and use energy to extract proteins from the lipid bilayer ...
Deepika Gaur, Brian Acquaviva, Baylee A. Smith, Nathan Walker, Isabella Walter, Matthew L. Wohlever   +5 more
wiley   +1 more source

A curve of positive solutions for an indefinite sublinear Dirichlet problem

, 2019
We investigate the existence of a curve $q\mapsto u_{q}$, with $q\in(0,1)$, of positive solutions for the problem $(P_{a,q})$: $-\Delta u=a(x)u^{q}$ in $\Omega$, $u=0$ on $\partial\Omega$, where $\Omega$ is a bounded and smooth domain of $\mathbb{R}^{N}$
Kaufmann, Uriel, Quoirin, Humberto Ramos, Umezu, Kenichiro   +2 more
core   +1 more source

Positive solutions for a class of singular boundary-value problems

Electronic Journal of Differential Equations, 2006
This paper concerns the existence and multiplicity of positive solutions for Sturm-Liouville boundary-value problems. We use fixed point theorems and the sub-super solutions method to two solutions to the problem studied.
Dang Dinh Hai
doaj  

Positive Solutions of Semilinear Equations in Cones [PDF]

Transactions of the American Mathematical Society, 1992
In this paper we consider the problem of finding a positive solution of the equation Δ u + | x | ν u ( n + 2 + 2
openaire   +2 more sources