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I have partly wikified this new page - but while doing so, I noticed that the Mathworld definition of Feigenbaum function  is rather different from the description in this article. Any comments ? Gandalf61 09:12, 15 December 2005 (UTC)
From what I can tell, the original author confused this with the logistic map. Somewhere, misplaced (I just looked for it), I have Feigenbaum's original paper on this, which corresponds with Mathworld's entry, as best as I can remember. Opa .. found it! hell of a paper. I should read it again.linas 05:32, 20 January 2006 (UTC)
I rewrote the article to reflect the more common usage of the expression Feigenbaum function. I have seen it used only in the two senses described in the article. XaosBits 16:32, 21 January 2006 (UTC)