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 Mizugadro, pentation, Book MphLee Fellow Posts: 184 Threads: 19 Joined: May 2013 01/11/2015, 02:32 PM Thanks and happy new year to you. 1- From italy the site is available. Anyways congratulations for the richness of the website, is really great. Even if, given my poor knowledge of the sophisticated analisys methods used there, I can't understand half of the contenents seems really really interesting, and plots look amazing! 2-About Pentation: l have to notice that long ago, in 2006, Rubtsov and Romerio [1] were able to compute a first approximation of the fixed point $L_{e,4,0}=-1.850354529...$. Their first approximation where denoted by $\sigma=-1.84140566...$ and $pent_e (-\infty)=sln(\sigma)={{}^\sigma}e=\sigma...$ (where pent is computed using their approximation). 4 - Sorry but I cant help you, I'm just an amateur mathematician PS: The way you plot function is really nice, is the same way one draws geographical map using contour lines! Is a common method to plot complex functions? [1] Rubtsov, Romerio - Notes on Hyper-Operations, Progress Report -NKS forum III, Final review 3, 2006. http://math.eretrandre.org/tetrationforu...hp?aid=222 MathStackExchange account:MphLee Fundamental Law $(\sigma+1)0=\sigma (\sigma+1)$ « Next Oldest | Next Newest »