Lagrangians, Hamiltonians and the Legendre Transform
43127
Why are Hamiltonian Mechanics well-defined?
68906
Do the same equations of motion imply the same Lagrangians?
59021
What is the most general expression for the coordinate representation of momentum operator?
13644
Is the change in the Lagrangian always a total derivative for symmetry transformations of the action?
114172
Derivation of Hamilton-Jacobi theory using canonical transformations
77245
Angular momentum squared and Hamiltonian?
101786
Proving the Lorentz invariance of the Lorentz invariant phase space element
49633
Hermitian conjugate of differential operator
18054
Is there a proof from the first principle that the Lagrangian L = T - V?
3603
Lagrangian and Hamiltonian EOM with dissipative force
28935
Lagrangian of the Euler equations
143157
Perturbation theory: justifying expansion in terms of eigenstates of the basis Hamiltonian
64727
Total time derivatives and partial coordinate derivatives in classical mechanics
56243
Representation under which Pauli matrices transform
64247
Noether Theorem and Energy conservation in classical mechanics
88525
Action and Action integral: Different kinds of variational principles
10785
Form of the Classical EM Lagrangian