Timeline for Invariance of the action under a symmetry of 2D isotropic harmonic oscillator
Current License: CC BY-SA 4.0
4 events
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| Sep 15 at 6:02 | history | edited | Qmechanic♦ | CC BY-SA 4.0 |
Added explanation
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| Sep 15 at 4:25 | comment | added | watahoo | I understand that a conserved charge can be derived by an infinitesimal quasi-symmetry under which the Lagrangian is changed by $\frac{d}{dt}F(q,\dot{q},t)$. My question is different. I am asking why this can be understood as a symmetry even although the action is changed more than a constant. | |
| Sep 15 at 4:15 | comment | added | watahoo | I of course agree with 1 & 2, but am not sure about 3. I looked at the link you shared and found that that question is similar to mine, although the OP cares more about the EOM rather than the action by itself. I read your answer but you did not explain why "quasisymmetry variations do not need to satisfy boundary conditions" | |
| Sep 14 at 15:44 | history | answered | Qmechanic♦ | CC BY-SA 4.0 |