Results 141 to 150 of about 43,657 (228)

Numerical Investigation of a Diffusive SIR Model: Focus on Positivity Preservation

Mathematical Methods in the Applied Sciences, Volume 49, Issue 11, Page 11775-11793, 30 July 2026.
ABSTRACT In this paper, we consider a system of semilinear partial differential equations (PDEs) representing a spatially extended SIR epidemic model. A brief analytical investigation of the well‐posedness and positivity of the solutions is provided in the appendix, while the main focus is on the numerical treatment of the model.
Rahele Mosleh, Claudia Panico, Messoud Efendiyev   +2 more
wiley   +1 more source

Earth's Infrared Background: A Physics‐Based Null Hypothesis for the Global‐Scale Subannual Variability of Outgoing Longwave Radiation

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Much of the outgoing longwave radiation (OLR) emitted to space can be described as a noisy “background” of random variability. A rigorous characterization of this background provides an objective null spectrum and enables the isolation of atmospheric phenomena within OLR observations, such as waves and storms.
Ofer Shamir, Edwin P. Gerber
wiley   +1 more source

Optimization problems in rearrangement classes for fractional p-Laplacian equations [PDF]

We discuss two optimization problems related to the fractional p-Laplacian. First, we prove the existence of at least one minimizer for the principal eigenvalue of the fractional p-Laplacian with Dirichlet conditions, with a bounded weight function ...
Porru Giovanni, Iannizzotto A.
core   +1 more source

Multiple solutions for superlinear fractional p-Laplacian equations

Partial Differential Equations and Applications
Abstract We study a Dirichlet problem driven by the (degenerate or singular) fractional p-Laplacian and involving a $$(p-1)$$ ( p - 1 )
Antonio Iannizzotto, Vasile Staicu, Vincenzo Vespri   +2 more
openaire   +4 more sources

Fine Boundary Regularity for the Singular Fractional P-Laplacian

Journal of Differential Equations
47 pages, 2 ...
A. Iannizzotto, S. Mosconi
openaire   +3 more sources

The Dirichlet problem for the fractional p-Laplacian evolution equation

Journal of Differential Equations, 2016
21 ...
openaire   +3 more sources

The trace fractional Laplacian and the mid-range fractional Laplacian [PDF]

In this paper we introduce two new fractional versions of the Laplacian. The first one is based on the classical formula that writes the usual Laplacian as the sum of the eigenvalues of the Hessian.
Ruiz Cases, Jorge, Rossi, Julio D.
core   +1 more source

Multiplicity and asymptotic behavior of solutions to a class of Kirchhoff-type equations involving the fractional p-Laplacian. [PDF]

J Inequal Appl, 2018
Shen L.
europepmc   +1 more source

Explicit iteration of an unbounded solution of turbulent flow model involving ψ-Riemann–Liouville fractional derivatives

Alexandria Engineering Journal
This paper is concerned for the first time an explicit iteration of an unbounded solution for a turbulent flow model involving ψ-Riemann–Liouville fractional derivatives with the p-Laplacian operator on the infinite interval [a,∞),a≥0.
Sabri T.M. Thabet, Imed Kedim, Bahaaeldin Abdalla, Thabet Abdeljawad   +3 more
doaj   +1 more source

Two generalized Lyapunov-type inequalities for a fractional p-Laplacian equation with fractional boundary conditions. [PDF]

J Inequal Appl, 2017
Liu Y, Xie D, Yang D, Bai C, Bai C.
europepmc   +1 more source