Results 81 to 90 of about 8,417 (227)
Solving Systems of Non-Linear Equations by Broyden's Method with Projected Updates [PDF]
We introduce a modification of Broyden's method for finding a zero of n nonlinear equations in n unknowns when analytic derivatives are not available.
David M. Gay, Robert B. Schnabel
core
Existence of solutions for semilinear problems on exterior domains
Electronic Journal of Differential Equations, 2020 In this article we prove the existence of an infinite number of radial solutions to $\Delta u+K(r)f(u)=0$ on $\mathbb{R}^{N}$ such that $\lim_{r \to \infty} u(r)=0$ with prescribed number of zeros on the exterior of the ball of radius R>0 where f ...
Joseph Iaia
doaj
Advanced Optical Materials, Volume 14, Issue 34, 11 September 2026.Motion was found to induce significant variation in the luminescence intensity ratio of NIR‐emitting Tm3+‐doped NaYbF4 nanoparticles, which has been ascribed to the population dynamics of the Tm3+ ion's excited states. These findings provide the groundwork for the design of motion nanosensors that can operate in environments not accessible with UV–vis ...
York Estewin Serge‐Correales +4 more
wiley +1 more source
Periodic solutions of weakly coupled superlinear systems [PDF]
, 2016 By the use of a higher dimensional version of the Poincaré–Birkhoff theorem, we are able to generalize a result of Jacobowitz and Hartman, thus proving the existence of infinitely many periodic solutions for a weakly coupled superlinear ...
SFECCI, ANDREA +3 more
core +1 more source
Advanced Electronic Materials, Volume 12, Issue 17, 7 September 2026.ABSTRACT Layered 2D materials are considered as promising for memristive applications due to their ultimate vertical scalability compared to conventional semiconductor films and pronounced hysteresis properties. Bias‐resolved Raman and Photoluminescence mapping is used to quantify strain from phonon shifts and carrier density from the exciton‐trion ...
Vladislav Kurtash +4 more
wiley +1 more source
Local quadratic convergence of polynomial-time interior-point methods for conic optimization problems [PDF]
In this paper, we establish a local quadratic convergence of polynomial-time interior-point methods for general conic optimization problems. The main structural property used in our analysis is the logarithmic homogeneity of self-concordant barrier ...
NESTEROV, Yu., TUNCEL, Levent
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The uniqueness for a superlinear eigenvalue problem
Applied Mathematics Letters, 1999 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +1 more source
Elliptic problems with superlinear convection terms
In this manuscript we deal with elliptic equations with superlinear first order terms in divergence form of the following type −div(M(x)∇u)=−div(h(u)E(x))+f(x), where M is a bounded elliptic matrix, the vector field E and the function f belong to ...
Rita Cirmi G., Boccardo L., Buccheri S.
core +2 more sources
Existence and nonexistence of solutions for semilinear equations on exterior domains
Electronic Journal of Differential Equations, 2016 In this article we study radial solutions of $\Delta u + K(r)f(u)= 0$ on the exterior of the ball of radius R>0 centered at the origin in ${\mathbb R}^{N}$ where f is odd with f0 on $(\beta, \delta)$, $f\equiv 0$ for $u> \delta$, and where the ...
Joseph A. Iaia
doaj
Multiple solutions to a boundary value problem for an n-th order nonlinear difference equation
Electronic Journal of Differential Equations, 1998 We seek multiple solutions to the n-th order nonlinear difference equation $$Delta^n x(t)= (-1)^{n-k} f(t,x(t)),quad t in [0,T]$$ satisfying the boundary conditions $$x(0) = x(1) = cdots = x(k - 1) = x(T + k + 1) = cdots = x(T+ n) = 0,.$$ Guo's fixed ...
Susan D. Lauer
doaj