Timeline for In an n-dimensional linear 2nd-order ODE, why is the transpose-inverse to a system of solutions also a solution?
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| Nov 10, 2009 at 18:58 | comment | added | Theo Johnson-Freyd | Equivalently, I'd like to show that if $S(q_1,q_2)$ is Hamilton's principle function, then $\frac{\partial^2 S}{\partial q_1\partial q_2}$ is a symmetric matrix. But when there are magnetic terms, then I don't know how to do this. | |
| Nov 10, 2009 at 8:42 | history | answered | Duke Leto | CC BY-SA 2.5 |