SwePub
Sök i SwePub databas

  Extended search

Träfflista för sökning "L773:1402 9251 OR L773:1776 0852 srt2:(1994)"

Search: L773:1402 9251 OR L773:1776 0852 > (1994)

  • Result 1-2 of 2
Sort/group result
   
EnumerationReferenceCoverFind
1.
  • Euler, Marianna, et al. (author)
  • Symmetry classification for a coupled nonlinear Schrödinger equation
  • 1994
  • In: Journal of Nonlinear Mathematical Physics. - : Springer Science and Business Media LLC. - 1402-9251 .- 1776-0852. ; 1:4, s. 358-379
  • Journal article (peer-reviewed)abstract
    • We do a Lie symmetry classification for a system of two nonlinear coupled Schrödinger equations. Our system under consideration is a generalization of the equations which follow from the analysis of optical fibres. Reductions of some special equations are given.
  •  
2.
  • Euler, Norbert, et al. (author)
  • Symmetry properties of the approximations of multidimensional generalized van der Pol equations
  • 1994
  • In: Journal of Nonlinear Mathematical Physics. - : Springer Science and Business Media LLC. - 1402-9251 .- 1776-0852. ; 1:1, s. 41-59
  • Journal article (peer-reviewed)abstract
    • The subject of the paper are symmetries of the nonlinear hyperbolic equation, $$\frac{\partial^2u}{\partial t^2} - \sum_{n=1}^N \frac{\partial^2u}{\partial^2x_n} +m^2u - \varepsilon f(u)\left(\lambda_0 \frac{\partial u}{\partial t} + \sum_{n=1}^N\lambda_n \frac{\partial u}{\partial x_n}\right) =0. $$ The case $f(u)=1-u^2$ corresponds to the generalized van der Pol equation. The equation is expanded in powers of the parameter $\varepsilon$, which stands in front of the nonlinear term, and then symmetries of the resulting chain of approximate equations are studied by means of the Lie-group technique. Emphasis is made on a special type of the function $f(u)$ which admits conformal invariance of the equation.
  •  
Skapa referenser, mejla, bekava och länka
  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Euler, Norbert (2)
Euler, Marianna (2)
Zachary, W.W (1)
Mahmood, M.F. (1)
Gill, T.L. (1)
University
Luleå University of Technology (2)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (2)
Year
1994 (2)Undo refine

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view