Services & ResourcesWolfram ForumsMathGroup Archive

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

Re: Some bugs in Mathematica

• To: mathgroup at smc.vnet.net
• Subject: [mg59328] Re: Some bugs in Mathematica
• From: akhmel at hotmail.com
• Date: Fri, 5 Aug 2005 01:23:19 -0400 (EDT)
• References: <200508010505.BAA24522@smc.vnet.net> <200508030519.BAA06378@smc.vnet.net> <dcsc4q$q0d$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Selwyn Hollis wrote:
> Re (1):  Mathematica 5.2 does not return the incorrect 0 result.
> Versions 5.0 and 5.1 do.

>
> Re (2):  After doing a little digging, I can't find any reference to
> how an Appell F1 ever reduces to a logarithm. I'm curious as to what
> exactly is the answer you wish to obtain.
>

You can look up the results in any table of integrals. It can be
presented in a number of ways. One of them is ArcTanh of a fraction
with numerator of one square root and denominator of another square
root. Another option of the answer is logarithm of the sum of square
roots.

> Re (3): Again, what elementary result are you expecting?
>
>

Example 3 is the same as example 2, so you just substitute the upper
limit of the integration and subtract the lower limit of integration.

Sincerely,

Alex

• Follow-Ups:
  • Re: Re: Some bugs in Mathematica
    • From: Andrzej Kozlowski <akoz@mimuw.edu.pl>

• References:
  • Some bugs in Mathematica
    • From: akhmel@hotmail.com
  • Re: Some bugs in Mathematica
    • From: akhmel@hotmail.com