[Date Index] [Thread Index] [Author Index]

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/ |
+--------------------------------------------------------------------------+