Timeline for Finite speed of propagation for a PDE
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 3, 2019 at 5:43 | review | Suggested edits | |||
| Oct 3, 2019 at 10:31 | |||||
| Oct 2, 2019 at 19:28 | comment | added | Ali | Yes you are correct, and that is why heuristically I only expect the finite speed of propagation to hold in the region that I defined. It could still easily be wrong | |
| Oct 2, 2019 at 19:23 | comment | added | Willie Wong | The principal part of your operator is not hyperbolic. Using $\sigma, \tau, \xi$ for the dual variables, the principal symbol is $P_2(\sigma,\tau,\xi) = - \tau^2 + \xi^2$. This is not hyperbolic in the $\tau$ direction as for any $\sigma \neq 0$, the mapping $\tau \mapsto P_2(\sigma,\tau,0)$ has a double root. | |
| Oct 2, 2019 at 18:07 | history | asked | Ali | CC BY-SA 4.0 |