Group analysis and exact solutions of a class of variable coefficient nonlinear telegraph equations

Details Group analysis and exact solutions of a class of variable coefficient nonlinear telegraph equations Group analysis and exact solutions of a class of variable coefficient nonlinear telegraph equations

2007-02-21

arxiv.org/abs/math-ph/0702072v2

J. Math. Phys., 2007, V.48, 073507

Physics

Mathematical Physics

23 pages

Scientific paper

10.1063/1.2747724

A complete group classification of a class of variable coefficient (1+1)-dimensional telegraph equations $f(x)u_{tt}=(H(u)u_x)_x+K(u)u_x$, is given, by using a compatibility method and additional equivalence transformations. A number of new interesting nonlinear invariant models which have non-trivial invariance algebras are obtained. Furthermore, the possible additional equivalence transformations between equations from the class under consideration are investigated. Exact solutions of special forms of these equations are also constructed via classical Lie method and generalized conditional transformations. Local conservation laws with characteristics of order 0 of the class under consideration are classified with respect to the group of equivalence transformations.

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