Results 101 to 110 of about 4,339 (214)

Symmetric Three-Term Recurrence Equations and Their Symplectic Structure

Advances in Difference Equations, 2010
We revive the study of the symmetric three-term recurrence equations. Our main result shows that these equations have a natural symplectic structure, that is, every symmetric three-term recurrence equation is a special discrete symplectic system.
Roman Šimon Hilscher, Vera Zeidan   +1 more
doaj   +1 more source

Stochastic Galerkin and Monte Carlo Methods for Parabolic Problems: Numerical Performance of Variational Matrix‐Free Approximations

Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.
ABSTRACT Stochastic Galerkin methods offer unexplored potential for the numerical simulation of parabolic problems with random variables, in particular if they are combined with variational discretizations of the space and time variables. Due to the high dimensionality, the solution of the arising algebraic systems do not become feasible without ...
Moataz Dawor, Nils Margenberg, Markus Bause   +2 more
wiley   +1 more source

Covariant Hamilton–Jacobi Formulation of Electrodynamics via Polysymplectic Reduction and Its Relation to the Canonical Hamilton–Jacobi Theory

Mathematics
The covariant Hamilton–Jacobi formulation of electrodynamics is systematically derived from the first-order (Palatini-like) Lagrangian. This derivation utilizes the De Donder–Weyl covariant Hamiltonian formalism with constraints incroporating generalized
Cecile Barbachoux, Monika E. Pietrzyk, Igor V. Kanatchikov, Valery A. Kholodnyi, Joseph Kouneiher   +4 more
doaj   +1 more source

Environmental Sustainability of Soybean Production in the Democratic Republic of Congo: Cases of Production Systems in the South‐Kivu and Kasaï‐Lomami Provinces

Journal of Sustainable Agriculture and Environment, Volume 5, Issue 4, December 2026.
Small versus large scale soybean production systems' footprints. ABSTRACT Soybean is increasingly grown in the Democratic Republic of the Congo (DRC), produced mainly in small‐scale systems and supplied locally for human consumption. Prospects of large‐scale expansion and intensification, with potential environmental drawbacks, loom and call for a ...
Réussite Bugale Malembaka, Stephan Pfister, Braida Thom, Kokou Kintche, Johanna Jacobi   +4 more
wiley   +1 more source

Rational points on even‐dimensional Fermat cubics

Transactions of the London Mathematical Society, Volume 13, Issue 1, December 2026.
Abstract We show that even‐dimensional Fermat cubic hypersurfaces are rational over any field of characteristic not equal to three, by constructing explicit rational parameterizations with polynomials of low degree. As a byproduct of our rationality constructions, we obtain estimates for the number of their rational points over a number field and ...
Alex Massarenti
wiley   +1 more source

Language Environments in Slovenian Early Education Centers: Examining Preschool Teachers' Speech Across Daily Classroom Activities

Mind, Brain, and Education, Volume 20, Issue 4, November 2026.
ABSTRACT Early childhood represents a unique window for language learning. Previous research has established reliable links between parental speech and the pace of children's language development; however, much less is known about children's naturalistic experiences in early education centers.
Naja Ferjan Ramírez, Urška Fekonja, Kaja Hacin Beyazoglu, Živa Manja Petrovec, Maja Buzuk, Nika Pogorelc‐Jesih   +5 more
wiley   +1 more source

Extreme Atmospheric Moistening and Drying Events at Ny‐Ålesund and Their Relation to Weather Systems

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 20, 28 October 2026.
Abstract Understanding the role of water vapor in Arctic amplification requires a detailed evaluation of its spatio‐temporal variability. In this work, we use an integrated water vapor (IWV) data set from a ground‐based microwave radiometer at Ny‐Ålesund, Svalbard, covering 2012–2024, to characterize temporal IWV variability.
Christian Buhren, Susanne Crewell, Claire Pettersen, Phillip Eisenhuth, Lars Aue, Christoph Ritter, Kerstin Ebell   +6 more
wiley   +1 more source

Fractional Nikiforov‐Uvarov Formalism for Dunkl‐Schrödinger Equation With Deng‐Fan Molecular Model

International Journal of Quantum Chemistry, Volume 126, Issue 19, October 5, 2026.
The effect of Dunkl deformation parameters on energy eigenvalues of Deng‐Fan potential (DFP) is evaluated using conformable fractional Nikiforov‐Uvarov method. Our results show that energy eigenvalues of DFP for selected diatomic molecules are significantly influenced by the Dunkl deformation parameter, fractional parameter, kinetic pre‐factor and ...
H. I. Alrebdi, U. S. Okorie, E. S. William, A. N. Ikot   +3 more
wiley   +1 more source

Classification of Jacobi solutions of double dispersion equation in uniform and inhomogeneous Murnaghan’s rod

Partial Differential Equations in Applied Mathematics
The double dispersion equation comprising the Lame coefficient, nonlinear coefficient, and Poisson ratio components is described as the uniform and inhomogeneous Murnaghan’s rod by A. M. Samsonov in Samsonov (2001). In this work, we apply the F expansion
Kottakkaran Sooppy Nisar, Rathinavel Silambarasan   +1 more
doaj   +1 more source

Optimising Connectivity in Deep‐Sea MPA Networks for Nephrops norvegicus Recovery in NW Mediterranean Sea

Ecology and Evolution, Volume 16, Issue 10, October 2026.
In the NW Mediterranean, where the Norway lobster (Nephrops norvegicus) is both ecologically and economically important, larval connectivity in an existing network of Fishery No‐Take Zones was estimated using Lagrangian transport simulation informed by species‐specific habitat models.
Morane Clavel‐Henry, Nixon Bahamon, Miguel López, Jacopo Aguzzi, Joan Navarro, Joan B. Company   +5 more
wiley   +1 more source