The Crocco transformation: order reduction and construction of Backlund transformations and new integrable equations

Details The Crocco transformation: order reduction and construction of Backlund transformations and new integrable equations The Crocco transformation: order reduction and construction of Backlund transformations and new integrable equations

2009-07-17

arxiv.org/abs/0907.3170v2

Nonlinear Sciences

Exactly Solvable and Integrable Systems

9 pages

Scientific paper

Wide classes of nonlinear mathematical physics equations are described that admit order reduction through the use of the Crocco transformation, with a first-order partial derivative taken as a new independent variable and a second-order partial derivative taken as the new dependent variable. Associated Backlund transformations are constructed for evolution equations of general form (special cases of which are Burgers, Korteweg-de Vries, and many other nonlinear equations of mathematical physics). The results obtained are used for order reduction and constructing exact solutions of hydrodynamics equations (Navier-Stokes, Euler, and boundary layer). A number of new integrable nonlinear equations, inclusive of the generalized Calogero equation, are considered.

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