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Is my ODE a Painleve equation in disguise? | | Jarmo Hietarinta
; Valery Dryuma
; | | Date: |
8 May 2001 | | Subject: | Exactly Solvable and Integrable Systems | nlin.SI | | Abstract: | Painleve equations belong to the class y’’ + a_1 {y’}^3 + 3 a_2 {y’}^2 + 3 a_3 y’ + a_4 = 0, where a_i=a_i(x,y). This class of equations is invariant under the general point transformation x=Phi(X,Y), y=Psi(X,Y) and it is therefore very difficult to find out whether two equations in this class are related. We describe R. Liouville’s theory of invariants that can be used to construct invariant characteristic expressions (syzygies), and in particular present such a characterization for Painleve equations I-IV. | | Source: | arXiv, nlin.SI/0105016 | | Services: | Forum | Review | PDF | Favorites | |
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