Results 101 to 110 of about 78,450 (174)

Forward and Adjoint Calculations of Gravitational Potential in Heterogeneous, Aspherical Planets

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract We have developed a computational package for the calculation of numerically exact internal and external gravitational potential, its functional derivatives and sensitivity kernels, in an aspherical, heterogeneous planet. We detail our implementation, utilizing a transformation of the Poisson equation into a spherical reference domain, as well
Alex D. C. Myhill, Matthew A. Maitra, David Al‐Attar   +2 more
wiley   +1 more source

Analysis and modeling of fractional Mandelbrot scaling for parameterization-invariant theories for mechanical systems

Physics Open
This study presents a comprehensive analysis and modeling framework that integrates Mandelbrot's fractal scaling with fractional variational principles to advance the understanding of parameterization-invariant theories for mechanical systems.
Yazen M. Alawaideh, Bashar M. Al-khamiseh, Shajar Abbas, Ioan-Lucian Popa, Hala Ghannam, Tasneem Alayed   +5 more
doaj   +1 more source

Positive solutions of discrete boundary value problems with the (p,q)-Laplacian operator

Electronic Journal of Differential Equations, 2017
We consider a discrete Dirichlet boundary value problem of equations with the (p,q)-Laplacian operator in the principal part and prove the existence of at least two positive solutions.
Antonella Nastasi, Calogero Vetro, Francesca Vetro   +2 more
doaj  

Newton's method in the context of gradients

Electronic Journal of Differential Equations, 2007
This paper gives a common theoretical treatment for gradient and Newton type methods for general classes of problems. First, for Euler-Lagrange equations Newton's method is characterized as an (asymptotically) optimal variable steepest descent method ...
John W. Neuberger, Janos Karatson
doaj  

Lagrangian multiforms and dispersionless integrable systems. [PDF]

Lett Math Phys
Ferapontov EV, Vermeeren M.
europepmc   +1 more source

Fast Numerical Solvers for Parameter Identification Problems in Mathematical Biology. [PDF]

J Sci Comput
Benková K, Pearson JW, Ptashnyk M.
europepmc   +1 more source

Kinematic modeling and simulation of dual-sided shaper machine using Newton-Euler and Lagrangian approaches. [PDF]

Sci Rep
Gutata GR, Kebede GA, Abbera GH.
europepmc   +1 more source

Explicit minimisers for anisotropic Riesz energies. [PDF]

Calc Var Partial Differ Equ
Frank RL, Mateu J, Mora MG, Rondi L, Scardia L, Verdera J.   +5 more
europepmc   +1 more source

Entropy and Variational Formulation of Relativistic Fluid Dynamics. [PDF]

Entropy (Basel)
Yahalom A.
europepmc   +1 more source

The 3d Mixed BF Lagrangian 1-Form: A Variational Formulation of Hitchin's Integrable System. [PDF]

Commun Math Phys
Caudrelier V, Harland D, Singh AA, Vicedo B.   +3 more
europepmc   +1 more source