Talk:Feigenbaum constants

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Different value for the first constants[edit]

In: Briggs, Keith A precise calculation of the Feigenbaum constants. (English) Math. Comp. 57 (1991), no. 195, 435--439. and Briggs, Keith How to calculate the Feigenbaum constants on your PC. Austral. Math. Soc. Gaz. 16 (1989), no. 4, 89--92.58F14

The constant is 4.669201609102990671853203820466201617258185577475768632745651343 00413433021131473

TraxPlayer (talk) 21:06, 8 September 2017 (UTC)[reply]

How do we calculate it???[edit]

It shows only the first couple of numbers. The article is a stub. How do we figure out the rest of the numbers?
--66.167.177.92 (talk) 02:19, 6 February 2010 (UTC)[reply]

Feigenbaum constants[edit]

Feigenbaum constants are not dimensionless numbers in sense of article Dimensionless number. They are mathematical constants (like π). Don't you think that this item should be removed from the list?

Nemuri 15:38, 26 Jun 2006 (UTC)

I don't see what α and δ are for. It's too confusing.

lbertolotti: i think we need someone who know something about this —Preceding unsigned comment added by Lbertolotti (talk • contribs) 13:42, 28 May 2008 (UTC)[reply]

Syntheticalconnections 02:48, 23 October 2007 (UTC)[reply]

Self similarity in the Mandelbrot set shown by zooming in on a round feature while panning in the negative-x direction. The display center pans from (−1, 0) to (−1.31, 0) while the view magnifies from 0.5 × 0.5 to 0.12 × 0.12 to approximate the Feigenbaum ratio $\delta$ .

This diagram may help you understand $\delta$ . I wish we had a diagram to explain α . Cuddlyable3 (talk) 18:14, 29 May 2008 (UTC)[reply]

The Feigenbaum constants are listed at Dimensionless number and that seems correct now that I have changed the lede to that article so it does not require any units to be involved in their calculation. Cuddlyable3 (talk) 20:58, 6 February 2010 (UTC)[reply]

Sloane sequence references[edit]

I love the Online Encyclopedia of Integer Sequences but decimal expansions are so uninteresting. There is nothing basic about decimal notation; it's just convenient because we're used to it. Axel 02:38, 31 May 2009 (UTC) —Preceding unsigned comment added by AxelHarvey (talk • contribs)

Removal of infobox[edit]

I have suggested centralizing the discussion regarding the removal of the infobx to Wikipedia_talk:WikiProject_Mathematics#Irrational_numbers_infobox as it refers to an infobox occurring in several articles. Please go there to build consensus on this edit. RobHar (talk) 19:37, 18 October 2009 (UTC)[reply]

Annals paper[edit]

Lyubich, Mikhail. "Feigenbaum-Coullet-Tresser universality and Milnor's hairiness conjecture." Ann. of Math. (2) 149 (1999), no. 2, 319–420, MR 1689333

I think this is relevant to the topic and its history but I don't know enough to write about it. 69.111.194.167 (talk) 21:29, 27 April 2011 (UTC)[reply]

Tines?[edit]

what are tines mentoined in article, because link is broken? — Preceding unsigned comment added by 83.23.16.219 (talk) 13:24, 23 June 2011 (UTC)[reply]

re-write + extension[edit]

I don't have time for a while, but soon intend to extend the article in places, adding more sources, and clarifying bits. I have a few sources which should help. F = q(E+v×B) ⇄ ∑_ic_i 14:54, 5 April 2012 (UTC)[reply]

And about the continuous functions, say for the logistic map

$f(x)=rx(1-x)$

rather than the discrete difference equation:

$x_{n+1}=rx(1-x)$

both appear to be in sources, and the continuous function version I wrote in the article is exactly a function in the source provided. Please don't change from one form to the other. F = q(E+v×B) ⇄ ∑_ic_i 14:58, 5 April 2012 (UTC)[reply]

Videos[edit]

Is it appropriate to add a link to a Youtube numberphile video explaining this constant, under the external links section? Numberphile Feigenbaum Constant 92.27.89.253 (talk) 09:29, 25 September 2017 (UTC)[reply]

ratios in logistic map[edit]

While the tabulated values previously written were the result of the calculation of the ratio between the numbers shown in table, the actual values are different, since the differences are very small and therefore rounding values become significant. I restored the values from the cited source. --.mau. ✉ 11:38, 19 July 2019 (UTC) — Preceding unsigned comment added by .mau. (talk • contribs)

Other values[edit]

In the period 3 window, when we look at the period doubling cascade, the constants have to be the same as the standard Feigenbaum constants. What is written in the "Other values" is false. Maybe you mean period tripling? Michal Misiurewicz 79.184.58.212 (talk) 11:59, 25 July 2023 (UTC)[reply]