most citedClasses of second order nonlinear differential equations reducible to first order ones by variation of parameters

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math-ph2011

Extremum conditions for functionals involving higher derivatives of several variable vector valued functions

Mahouton Norbert Hounkonnou, Pascal Dkengne Sielenou

This paper addresses both necessary and relevant sufficient extremum conditions for a variational problem defined by a smooth Lagrangian, involving higher derivatives of several va…