β«πdt
πβοΈβοΈ
πβ«πΆββοΈ
β«Ξ΄L=0
β«γ°οΈπ
π’βοΈβ±οΈ
γ°οΈπβ¨
#lagrangian mechanics #action principle #calculus of variations #least action #integral #script l