Results 131 to 140 of about 4,851,792 (234)

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

open access: yesElectronic 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   +2 more
doaj  

Fractional Euler–Lagrange Equations of Motion in Fractional Space

open access: yes, 2006
: Fractional variational principles have gained considerable importance during the last decade due to their various applications in several areas of science and engineering.
Dumitru Baleanu, Sami I. Muslih
core  

Newton's method in the context of gradients

open access: yesElectronic 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  

Point symmetries of the Euler-Lagrange equations

open access: yes, 2017
Damos una derivación elemental de las ecuaciones para las simetrías puntuales de las ecuaciones de Euler-Lagrange para una lagrangiana de un sistema con un número finito de grados de libertad.
Torres del Castillo, Gerardo F.
core  

Euler, Lagrange and life insurance

open access: yes, 2008
Frederick the Great, who had summoned Euler from St. Petersburg to Berlin to organize the Academy of Science, often asked his advise on technical matters concerning pension funds or life annuities, even if Euler’s memoirs on this theme were all published
BORGATO, Maria Teresa
core  

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