Re: calculate Recurrence Equations

*To*: mathgroup at smc.vnet.net*Subject*: [mg68752] Re: calculate Recurrence Equations*From*: Oliver Ruebenkoenig <ruebenko at uni-freiburg.de>*Date*: Fri, 18 Aug 2006 03:11:54 -0400 (EDT)*References*: <ec1a1u$omo$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hallo Frank, try: anteil[0] = 1 anteil[n_] := anteil[n] = anteil[n - 1] + (anteil[n - 1]*5 - 1)/100 and you might want to read the section on dynamic programming (section 2.5.9) in the HelpBrowser Oliver On Thu, 17 Aug 2006, Frank Hechtner wrote: > hi, > > i?m in trouble with my Recurrence Equations: > > i?ve defined the following function > > anteil[0] = 1 > anteil[n_] := anteil[n - 1] + (anteil[n - 1]*5 - 1)/100 > > i want mathematica to calculate the values for anteil[30] and so on. > > Unfortunately mathematica needs for this calculation over 2 hours (and > is still running, athlon x2 4600, 2 gb ram). > > I don?t see where are the difficulties for mathematica... > > Thanx for your help > > frank > > Oliver Ruebenkoenig, <ruebenko at uni-freiburg.de> Phone: ++49 +761 203 7388