Timeline for Quadratic PDE Systems
Current License: CC BY-SA 3.0
19 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 10, 2014 at 16:58 | vote | accept | rrz | ||
| Jul 8, 2014 at 15:48 | history | edited | rrz | CC BY-SA 3.0 |
added 68 characters in body
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| Jul 8, 2014 at 14:48 | comment | added | fedja | >>>>Please avoid extended discussions in comments. Would you like to automatically move this discussion to chat?<<<< No, it is not an individual/private discussion. | |
| Jul 8, 2014 at 14:43 | answer | added | fedja | timeline score: 2 | |
| Jul 8, 2014 at 14:38 | history | edited | rrz | CC BY-SA 3.0 |
clarified t and c
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| Jul 8, 2014 at 11:10 | comment | added | fedja | Also, what is the exact range of $t$: the whole line, a ray (up or down), an interval? | |
| Jul 8, 2014 at 11:07 | comment | added | fedja | >>> also $c_n$ non zero <<< any chance to know which ones are positive and which ones are negative? | |
| Jul 8, 2014 at 10:55 | comment | added | rrz | also $c_n$ non zero and not $w_s = k w$ - edit: well actually why not $w_s = k w$...thanks for making me think about this, I think I have something that might work. Cheers. | |
| Jul 8, 2014 at 10:35 | history | edited | rrz | CC BY-SA 3.0 |
4th term should be \partial_x rather than \partial_xx
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| Jul 8, 2014 at 10:34 | comment | added | rrz | Dear @fedja, in fact the above problem was motivated by exactly such a "trivial" $w_q(t)$ series of ODE which I wished to extend to $w_q(t,x)$. I am looking for non-trivial solutions (non-constant [not possible anyway I think], at least first order function of x and t). Showing non-existence is fine too although I suspect it exists as I have an approximation for the underlying motivating problem. | |
| Jul 8, 2014 at 9:54 | comment | added | fedja | OK, but it is still unclear if you want to find just one solution (which is trivial: look for functions that depend on $t$ only) or you want to show that nothing else is there, or something else. | |
| Jul 8, 2014 at 8:49 | history | edited | rrz | CC BY-SA 3.0 |
added 5 characters in body
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| Jul 8, 2014 at 8:48 | comment | added | rrz | Thanks Kofi and @fedja for pointing out the mistakes. I'm sorry for not mentioning the $c_n$ even though that might help in making the problem more specific. However, my point was just to ask for general comments and direction (e.g. book references, have you seen this before somewhere etc), which I should perhaps have made more clear in the question. My problem is that I've never seen such types of equations before. | |
| Jul 7, 2014 at 3:28 | history | edited | rrz | CC BY-SA 3.0 |
added 21 characters in body
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| Jul 6, 2014 at 20:44 | history | edited | rrz | CC BY-SA 3.0 |
added = 0; it's now an equation.
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| Jul 6, 2014 at 11:17 | comment | added | Matthias Ludewig | There is not even an equation! | |
| Jul 6, 2014 at 9:01 | comment | added | fedja | >>> I would like to find the series of solutions $w(t,x)_q$ <<< Under what additional constraints? I doubt you are after $0,1,0,2,0,239,0,c_2t-c_1x,...$ etc. | |
| Jul 6, 2014 at 7:54 | review | First posts | |||
| Jul 6, 2014 at 8:18 | |||||
| Jul 6, 2014 at 7:38 | history | asked | rrz | CC BY-SA 3.0 |