Talk:Lorenz attractor

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Contents 1 Three models 2 EMERGENCY 3 Plain English 4 Referencing 5 Broken links 6 Raleigh number transition 7 What is it?

[edit] Three models

The three coupled differential equations model convection rolls in the atmosphere. Do the three variables x, y, and z describe the position of a small cell of air? If not, then to what physical attribute do they apply?

No, X, Y and Z are the coefficients of the main terms in a series expansion of the stream function (its curl gives the velocity components) and of the temperature distribution. See e.g. [1], or even better the original [2]. —The preceding unsigned comment was added by 81.14.185.86 (talk) 11:07, 28 December 2006 (UTC).

[edit] EMERGENCY

ive got to run a program to produce this crap for friday! what are the initial values for x, y, z? im currently using x=-2 y=0 z=40 —Preceding unsigned comment added by 62.136.133.147 (talk) 02:26, 29 April 2008 (UTC)

PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP

-(

please answer TY —Preceding unsigned comment added by62.136.133.147 (talk) 02:22, 29 April 2008 (UTC)

it looks like it doesnt matter, the variables take the correct values after a certain amount of time. i suppose you can use whatever you like

[edit] Plain English

"is a non-linear three-dimensional deterministic dynamical system derived from the simplified equations of convection rolls arising in the dynamical equations of the atmosphere" means nothing to anybody but the already educated. This is not a suitable explanation of what the Lorenz attractor is. We need to remove such technical barriers to Wikipedia entries. This is an encyclopedia for all not just for maths geeks 199.4.27.1 14:23, 24 April 2006 (UTC)

very good point. Have tried to make some improvements, especially to that horrendous opening. -- GWO

[edit] Referencing

The article improved significantly since the last time I've read it (about 6 months ago) and some interesting facts were added. However now it lacks references. Specifically:

• 2001 Tucker work
• applications in lasers and dynamos (I found only info about the waterwheel at [1])

[edit] Broken links

It seems that the links to the java simulations under the images are broken. I think the website has been taken down, it seems to redirect to a portugese web-site provider now. 144.32.212.71 12:10, 16 February 2007 (UTC)

Just a temporary problem. Tó campos 18:34, 16 February 2007 (UTC)

[edit] Raleigh number transition

Following the link to the applet, I noticed the value of rho where chaos is noted as beginning is at most 23, which is lower than this article's 24.74. Is this a typo? 67.189.108.27 06:13, 4 August 2007 (UTC)

[edit] What is it?

What set, exactly, is the Lorenz attractor? Every model I've seen is a model of trajectories of solutions, not a model of the attractor itself. Is the Lorenze attractor a set? Is it just the 2 equilibria? Is there a homoclinic orbit connecting the equilibria? SmaleDuffin 19:04, 19 October 2007 (UTC)