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$C^{\infty}$ -symmetries and reduction of equations without Lie point symmetries.

Muriel, C., Romero, J. L. (2003)

Journal of Lie Theory

Canonical form transformation of second order differential equations with Lie symmetries.

Schwarz, Fritz (2000)

Journal of Lie Theory

Center conditions for a simple class of quintic systems.

Volokitin, Evgenii P. (2002)

International Journal of Mathematics and Mathematical Sciences

Characterization of several classes of second-order ODEs by using differential invariants.

Martín del Rey, A., Muñoz Masqué, J. (2005)

International Journal of Mathematics and Mathematical Sciences

Coefficients of prolongations for symmetries of ODEs.

Alfaro, Ricardo, Schaeferle, Jim (2004)

International Journal of Mathematics and Mathematical Sciences

Constant invariant solutions of the Poincaré center-focus problem.

Nicklason, Gary R. (2010)

Electronic Journal of Differential Equations (EJDE) [electronic only]

Currently displaying 1 – 6 of 6

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