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pro vyhledávání: '"Quintero, Agustín Caparrós"'
Publikováno v:
J. Phys. A: Math. Theor. 51 (2018) 385201 (22pp)
We derive the general structure of the space of formal recursion operators of nonevolutionary equations~$q_{tt}=f(q,q_{x},q_t,q_{xx},q_{xt},q_{xxx},q_{xxxx})$. This allows us to classify integrable Lagrangian systems with a higher order Lagrangian of
Externí odkaz:
http://arxiv.org/abs/1804.04459
