오일러-라그랑주_방정식,Euler-Lagrange_equation Copy: 오일러-라그랑주_방정식,Euler-Lagrange_equation has comma Hide Show $\displaystyle \frac{\partial L}{\partial x_i} - \frac{d}{dt}\left( \frac{\partial L}{\partial \dot{x_i}} \right) = 0,\;\; i=1,2,3.$ Euler-Lagrange_equation = https://en.wiktionary.org/wiki/Euler-Lagrange_equation
