AW: Simple question or how Mathematica getting on my nerves.

*To*: mathgroup at smc.vnet.net*Subject*: [mg45786] AW: [mg45779] Simple question or how Mathematica getting on my nerves.*From*: Klamser at t-online.de (Peter Klamser)*Date*: Sun, 25 Jan 2004 03:04:41 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Hi, you pay attention to the precision of your computation. N[Integrate[2687176093959399272413585923303421161600*(1 - f)^67*f^61,{f, 0.6214`50.,0.5242`50.}]] will produce the right result. That is a often discussed problem: Search "Mathematica precision accuracy" in google Regards Peter -----Ursprüngliche Nachricht----- Von: George [mailto:gtsavdar at auth.gr] Gesendet: Samstag, 24. Januar 2004 06:37 An: mathgroup at smc.vnet.net Betreff: [mg45779] Simple question or how Mathematica getting on my nerves. Although the 2 results must be the same they aren't. WHY??????? And not only this, but they differ by 10^21!!!!!! WHY???????? Please copy and paste this to Mathematica (i tried 5.0 and 4.2) to understand what i mean: \!\(k[f_] := 2687176093959399272413585923303421161600\ *\((1 - f)\)\^67\ * f\^61\[IndentingNewLine] N[\[Integral]\_\(6214\/10000\)\%\(5242\/10000\)k[ f] \[DifferentialD]f]\[IndentingNewLine] N[\[Integral]\_0.6214\%0.5242 k[f] \[DifferentialD]f]\)