Results 61 to 70 of about 667 (175)

Robin double-phase problems with singular and superlinear terms

, 2020
We consider a nonlinear Robin problem driven by the sum of ▫$p$▫-Laplacian and ▫$q$▫-Laplacian (i.e. the ▫$p, q)$▫-equation). In the reaction there are competing effects of a singular term and a parametric perturbation ▫$lambda f(z,x)$▫, which is ...
Rǎdulescu, Vicenţiu, Papageorgiou, Nikolaos S., Repovš, Dušan   +2 more
core   +1 more source

A Jacobian‐Free Newton‐Krylov Method for Cell‐Centred Finite Volume Solid Mechanics

International Journal for Numerical Methods in Engineering, Volume 127, Issue 3, 15 February 2026.
ABSTRACT This study proposes a Jacobian‐free Newton‐Krylov approach for finite‐volume solid mechanics. Traditional Newton‐based approaches require explicit Jacobian matrix formation and storage, which can be computationally expensive and memory‐intensive.
Philip Cardiff, Dylan Armfield, Željko Tuković, Ivan Batistić   +3 more
wiley   +1 more source

Global multiplicity of positive solutions for anisotropic $(p,q)$-Robin boundary value problems with an indefinite potential term

Electronic Journal of Qualitative Theory of Differential Equations
We consider a nonlinear Robin problem driven by the anisotropic $(p,q)$-Laplacian plus an indefinite potential term. In the reaction, we have the competing effects of a parametric concave (sublinear) term perturbed by a superlinear one (concave-convex ...
Eylem Öztürk, Nikolaos Papageorgiou
doaj   +1 more source

Narrow Linewidth Spontaneous and Lasing Emissions from Open‐Access Microcavity‐Embedded Perovskite Quantum Dots

Advanced Optical Materials, Volume 14, Issue 1, 9 January 2026.
Continuous‐wave lasing from a small number of perovskite quantum dots is achieved by coupling their photoluminescence to open‐access curved dielectric cavities. This geometry confines their emission into a single optical mode, sharply narrowing linewidths in both spontaneous and lasing regimes.
Sunny Tiwari, Amit R. Dhawan, SangHyuk Park, Sangeun Cho, Gareth S. Jones, Jason M. Smith, Robert A Taylor, Tristan Farrow   +7 more
wiley   +1 more source

Multiple solutions for superlinear fractional p-Laplacian equations [PDF]

We study a Dirichlet problem driven by the (degenerate or singular) fractional p-Laplacian and involving a (p-1)-superlinear reaction at infinity, not necessarily satisfying the Ambrosetti–Rabinowitz condition.
Staicu, Vasile, Vespri, Vincenzo, Iannizzotto, Antonio   +2 more
core   +1 more source

A Bi‐Level Optimization Model for Carbon Reduction in Multi‐Echelon Power Equipment Supply Chains Under Carbon Quota and Trading

IET Renewable Power Generation, Volume 20, Issue 1, January/December 2026.
This study proposes a bi‐level optimization model to coordinate carbon reduction across multi‐echelon power equipment supply chains under carbon quota and trading policies. Results demonstrate that carbon price provides dual incentives for abatement and revenue generation, with the abatement cost coefficient being the dominant factor influencing ...
Wei Xu, Lu Zhang, Grace Kouassi
wiley   +1 more source

Moment‐Based Risk Coordination for Multi‐Area Power Systems Under Non‐Gaussian Uncertainty

IET Renewable Power Generation, Volume 20, Issue 1, January/December 2026.
This paper proposes a hierarchical probabilistic coordination framework for multi‐area power systems that incorporates higher‐order statistical moments–mean, variance, skewness and kurtosis–via the Cornish–Fisher expansion to capture non‐Gaussian wind power uncertainty.
Aamir Nawaz, Aftab Ahmed Almani, Rizwan Ahmed, Zahid Javid, William Holderbaum   +4 more
wiley   +1 more source

A bifurcation-type theorem for the positive solutions of a nonlinear Neumann problem with concave and convex terms

Le Matematiche, 2010
We consider a nonlinear elliptic Neumann problem driven by the p-Laplacian with a reaction that involves the combined effects of a “concave” and of a “convex” terms.
Dimitrie Kravvaritis, Nikolaus S. Papageorgiou, George Smyrlis   +2 more
doaj  

Positive and nodal solutions for nonlinear nonhomogeneous parametric Neumann problems

Electronic Journal of Differential Equations, 2020
We consider a parametric Neumann problem driven by a nonlinear nonhomogeneous differential operator plus an indefinite potential term. The reaction term is superlinear but does not satisfy the Ambrosetti-Rabinowitz condition.
Nikolaos S. Papageorgiou, Calogero Vetro, Francesca Vetro   +2 more
doaj  

Computational Framework for Numerical Simulation of Fractional‐Order Financial Crime Model via Lucas Collocation Technique

Journal of Applied Mathematics, Volume 2026, Issue 1, 2026.
The Lucas collocation approach is used in this study to approximate a fractional‐order financial crime model (FOFCM) numerically. The model categorizes the population into five groups: persons without a financial criminal past, those inclined toward financial crimes, active participants, individuals undergoing prosecution, and those imprisoned.
Mahmoud Abd El-Hady, Homan Emadifar, Mehdi Hariri, Atallah El-Shenawy, Chong Lin   +4 more
wiley   +1 more source