>> >> >> The Euler-Lagrange Equations only specify when a >> >> >> stationary condition occurs. >> >> > >> >> > What do you mean by "only"? What else do you need? >> >> >> >> Given a functon f(x), to find the minimum of this function, you solve >> >> for x of the following. >> >> >> >> df(x)/dx = 0 >> >> >> >> x only shows a stationary condition. It is still up to your dilligence >> >> to show >> >> >> >> d^2f(x)/dx^2 < 0 >> >> >> >> In doing so, you can then claim a minimum of f(x). This is as basic as >> >> you can get. >> > >> > This is true except it's not relevant to this situation: >> >> You are wrong. It is still relevant. > > No, it's not. You don't need the minimum to compute motion. Have you > ever read a book on classical mechanics? So, moving from point A to point B, if you don't need a minimum time elapsed, then you can have an infinite number of ways to do so. The laws of physics exist because moving from point A to point B only allows one path. |
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Fumble Index | Original post & context: 1145161498.661170.92700@i39g2000cwa.googlegroups.com |