Quantum redactiones paginae "Aequationes Lagrangi" differant

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</math>
 
quod identificamus ut [[Aequatio Lorentziana|aequationem virium Lorentz]]
 
:::<math>\frac{d}{d t}\left(\frac{m \dot{\vec{x}}} {\sqrt {1 - \frac{v^2}{c^2}}}\right) = q \vec{E}[\vec{x},t]