Timeline for Stability analysis of a system of 2 second order nonlinear differential equations
Current License: CC BY-SA 2.5
18 events
| when toggle format | what | by | license | comment | |
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| Dec 14, 2009 at 21:36 | answer | added | Duke Leto | timeline score: 3 | |
| Dec 9, 2009 at 8:45 | comment | added | Kim Morrison | @fpqc. Rudeness is unacceptable. I've failed at this in the past, but I'll try to reform too. :-) | |
| Dec 7, 2009 at 6:00 | vote | accept | Jeremy | ||
| Dec 7, 2009 at 5:55 | vote | accept | Jeremy | ||
| Dec 7, 2009 at 5:58 | |||||
| Dec 6, 2009 at 14:46 | comment | added | Alicia Garcia-Raboso | @fpqc: all these homework questions come from different people. If all of them were coming from the same person, then maybe rudeness would have some effect, even though I don't find it appropiate. I think there's a discussion to be had on tea.mathoverflow.net about this, since MO will keep growing and inevitably will me more visible on Google and other search engines, which will most probably attract more people looking to get there homework problems solved. | |
| Dec 6, 2009 at 14:09 | comment | added | Harry Gindi | There is reason to be rude given the large influx of homework questions. | |
| Dec 6, 2009 at 12:46 | answer | added | Aaron Hoffman | timeline score: 3 | |
| Dec 5, 2009 at 22:43 | comment | added | Alicia Garcia-Raboso | @fpqc: there is no need to be so rude. Also, MINUS 1 POWER1111111111111 = MINUS 1 ;) | |
| Dec 5, 2009 at 21:44 | comment | added | Harry Gindi | We do the rare mathematical physics question here, but usually it's at a much higher level than this. | |
| Dec 5, 2009 at 20:49 | history | edited | Jeremy | CC BY-SA 2.5 |
response to comments
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| Dec 5, 2009 at 20:42 | comment | added | Charles Siegel | fpqc: that's not really true. We do have mathematical physics questions here, and studying the differential equations of systems of pendulums should be fair game, so long as the question is phrased clearly and mathematically. Now, Jeremy seems to be asking about how to take a nonlinear system of ODEs and linearize it, probably hoping for an analogy to the single pendulum where you got from $x''+sin x=0$ to $x''+x=0$ for small amplitude approximation. I don't know if there's a way to do this, because I don't know this stuff at all, but if he clarified, it should be a perfectly good question. | |
| Dec 5, 2009 at 20:15 | comment | added | Harry Gindi | There's not really anything interesting to talk about here, so MINUS 1 POWER1111111111111. If your question involves pendulums or mass, it probably doesn't belong here. We only like to talk about the purest math here, for the most part. I don't know if there's a physics overflow, or an applied math overflow, but maybe you could try a math help IRC channel, say #math on freenode or #math on efnet. | |
| Dec 5, 2009 at 19:32 | history | edited | Jeremy | CC BY-SA 2.5 |
added 218 characters in body
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| Dec 5, 2009 at 19:26 | history | edited | Jeremy | CC BY-SA 2.5 |
added 344 characters in body
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| Dec 5, 2009 at 19:22 | comment | added | Jeremy | I am trying to get a feel for what analysis us used beyond the introduction I have had. The equations for the double pendulum were derived from the second derivative of the equations for position of each mass and the tension of the mass against the rods. So far the only understanding I have been able to get from it is using numerically generated phase planes and plots motion made in maple. My Original post is at mathoverflow.net/questions/7849/… | |
| Dec 5, 2009 at 16:36 | comment | added | Ben Webster♦ | Jeremy- Your last question was closed for being a homework problem. Writing another one that's so vague most people won't follow it won't help matters. | |
| Dec 5, 2009 at 16:02 | comment | added | Ben Weiss | Hi Jeremy, not all of us had a chance to read your last post, could you provide more details here? Tell us the set up of the problem, and maybe even a sentence or two about how you got interested in it and what you've tried? | |
| Dec 5, 2009 at 15:41 | history | asked | Jeremy | CC BY-SA 2.5 |