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An integration by parts with respect to time can transfer the time derivative of δq j to the ∂L/∂(dq j /dt), in the process exchanging d(δq j)/dt for δq j, allowing the independent virtual displacements to be factorized from the derivatives of the Lagrangian, = = (+ (˙) ˙) = = [˙] + = (˙).
The Lotka–Volterra equations, also known as the Lotka–Volterra predator–prey model, are a pair of first-order nonlinear differential equations, frequently used to describe the dynamics of biological systems in which two species interact, one as a predator and the other as prey.
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He means exactly what his teacher means, I suspect. (do your own homework)Superm401 | Talk 00:13, 3 December 2005 (UTC) Do your own homework. It's a little offensive when you give exact numbers (thus indicating that this is a homework problem), and say "plz give a detailed answer." --
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