Results 21 to 30 of about 5,619,071 (301)
Gravitationally dressed Parke-Taylor amplitudes [PDF]
, 1997 A generating function for the Parke-Taylor amplitudes with any number of positive helicity gravitons in addition to the positive helicity gluons is obtained using the recently constructed self-dual classical solution of the type of perturbiner in Yang ...
Bern Z., K. G. Selivanov, Korepin V.
core +2 more sources
On existence of positive periodic solutions [PDF]
Monatshefte f�r Mathematik, 1998 Let \(\Omega\) be an open convex subset of \(\mathbb{R}^n\). A differential equation \[ \dot x=f(t,x) \tag{1} \] on \(\mathbb{R}\times \text{cl} \Omega\) is considered. It is assumed that the right-hand side of (1) is \(T\)-periodic in \(t\). The main theorem asserts the existence of a fixed point of the Poincaré map associated to (1) in \(\Omega ...
openaire +2 more sources
On Positive Solutions for Some Nonlinear Semipositone Elliptic Boundary Value
Nonlinear Analysis, 2006 This study concerns the existence of positive solutions to classes of boundary value problems of the form −∆u = g(x,u), x ∈ Ω, u(x) = 0, x ∈ ∂Ω, where ∆ denote the Laplacian operator, Ω is a smooth bounded domain in RN (N ≥ 2) with ∂Ω of class C2, and ...
G. A. Afrouzi, S. H. Rasouli
doaj +1 more source
Solutions and positive solutions for superlinear Robin problems [PDF]
Journal of Mathematical Physics, 2019 We consider nonlinear, nonhomogeneous Robin problems with a (p − 1)-superlinear reaction term, which need not satisfy the Ambrosetti-Rabinowitz condition. We look for positive solutions and prove existence and multiplicity theorems. For the particular case of the p-Laplacian, we prove existence results under a different geometry near the origin.
N. S. Papageorgiou, C. Vetro, F. Vetro
openaire +3 more sources
Positive Solutions of Advanced Differential Systems [PDF]
The Scientific World Journal, 2013 We study asymptotic behavior of solutions of general advanced differential systems , where F : Ω → ℝn is a continuous quasi‐bounded functional which satisfies a local Lipschitz condition with respect to the second argument and Ω is a subset in , , yt∈, and yt(θ) = y(t + θ), θ ∈ [0, r]. A monotone iterative method is proposed to prove the existence of a
Mária Kúdelčíková, Josef Diblík
openaire +4 more sources
A note on the dependence of solutions on functional parameters for nonlinear Sturm-Liouville problems [PDF]
Opuscula Mathematica, 2014 We deal with the existence and the continuous dependence of solutions on functional parameters for boundary valued problems containing Sturm-Liouville equation.
Aleksandra Orpel
doaj +1 more source
On the positivity of solutions of systems of stochastic PDEs [PDF]
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2012 AbstractWe study the positivity of solutions of a class of semi‐linear parabolic systems of stochastic partial differential equations by considering random approximations. For the family of random approximations we derive explicit necessary and sufficient conditions such that the solutions preserve positivity.
Messoud Efendiev +3 more
openaire +3 more sources
Equilibrium solution to the lowest unique positive integer game
, 2010 We address the equilibrium concept of a reverse auction game so that no one can enhance the individual payoff by a unilateral change when all the others follow a certain strategy.
Baek, Seung Ki, Bernhardsson, Sebastian
core +1 more source
Positive solutions of a renewal equation [PDF]
Annales Polonici Mathematici, 1992 Take the scalar integral equation \(x(t)=\int_ R h(t-s)f(s,x(s))ds\), \(t\in R\), and assume that \(h\geq 0\), \(h\in L^ 1(R)\), and that there exist positive constants \(M\), \(K\), \(\varepsilon\) such that \(0\leq f(t,x)\leq M\); \(t\in R\), \(x\in [0,\infty)\); \(f(t,x)\geq Kx\), \(t\in R\), \(x\in[0,\varepsilon)\), \(K\int_ R h(s)ds>1\).
openaire +2 more sources
Global Behavior of a Higher Order Fuzzy Difference Equation
Mathematics, 2019 Our aim in this paper is to investigate the convergence behavior of the positive solutions of a higher order fuzzy difference equation and show that all positive solutions of this equation converge to its unique positive equilibrium under appropriate ...
Guangwang Su, Taixiang Sun, Bin Qin
doaj +1 more source