Simple integral wrong

*To*: mathgroup at smc.vnet.net*Subject*: [mg25021] Simple integral wrong*From*: Paul Cally <cally at kronos.maths.monash.edu.au>*Date*: Fri, 1 Sep 2000 21:57:29 -0400 (EDT)*Organization*: Monash University*Sender*: owner-wri-mathgroup at wolfram.com

Try integrating | cos u| from u=0 to u = Pi x. Despite the integrand being everywhere non-negative, Mathematica 4 gives a result which jumps DOWNWARDS by 2 at x=1/2, 3/2, 5/2, .... I thought these simple integration errors had been sorted out by Wolfram years ago! Paul Cally -- +--------------------------------------------------------------------------+ |Assoc Prof Paul Cally | Ph: +61 3 9905-4471 | |Dept of Mathematics & Statistics | Fax: +61 3 9905-3867 | |Monash University | paul.cally at sci.monash.edu.au | |PO Box 28M, Victoria 3800 | | |AUSTRALIA | http://www.maths.monash.edu.au/~cally/ | +--------------------------------------------------------------------------+