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 Find all fixed points of exp[b] Gottfried Ultimate Fellow Posts: 789 Threads: 121 Joined: Aug 2007 10/07/2014, 11:00 AM (10/07/2014, 01:50 AM)mike3 Wrote: Addendum: You can replace Wapprox with this: Code:Wapprox(k, z) = {    local(brl = brlog(k, z));    local(lbrl = log(brl));    return(brl - lbrl + sum(kk=0,5,sum(m=1,5,c(kk, m)*lbrl^m * brl^(-kk-m)))); } to get even more speed (saves some repeated log calculations).Hi Mike - very well, thank you! I've also made the coefficients c() constants in a small matrix, because your routine uses them only to small arguments but repeatedly, also made Pi2I a constant. I've got 120 frixpoints to base 4 with 200 digits precision in 656 ms on a 2 Ghz machine. Great! Gottfried Gottfried Helms, Kassel « Next Oldest | Next Newest »

 Messages In This Thread Find all fixed points of exp[b] - by MorgothV8 - 08/30/2014, 01:41 PM RE: Find all fixed points of exp[b] - by MorgothV8 - 09/17/2014, 04:17 PM RE: Find all fixed points of exp[b] - by jaydfox - 09/17/2014, 11:10 PM RE: Find all fixed points of exp[b] - by MorgothV8 - 09/18/2014, 04:31 AM RE: Find all fixed points of exp[b] - by MorgothV8 - 09/24/2014, 03:53 PM RE: Find all fixed points of exp[b] - by jaydfox - 09/26/2014, 04:47 PM RE: Find all fixed points of exp[b] - by mike3 - 09/29/2014, 01:49 AM RE: Find all fixed points of exp[b] - by mike3 - 09/29/2014, 02:41 PM RE: Find all fixed points of exp[b] - by mike3 - 10/07/2014, 01:32 AM RE: Find all fixed points of exp[b] - by mike3 - 10/07/2014, 01:50 AM RE: Find all fixed points of exp[b] - by Gottfried - 10/07/2014, 11:00 AM

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