Re: Some bugs in Mathematica
- To: mathgroup at smc.vnet.net
- Subject: [mg59473] Re: Some bugs in Mathematica
- From: Paul Abbott <paul at physics.uwa.edu.au>
- Date: Wed, 10 Aug 2005 02:57:43 -0400 (EDT)
- Organization: The University of Western Australia
- References: <200508010505.BAA24522@smc.vnet.net> <1192.12.210.86.190.1123296535.squirrel@webmail.wolfram.com> <BAY106-DAV184D0BD361AEF55157E0CBC9C60@phx.gbl> <42F50087.5050308@wolfram.com> <BAY106-DAV47DC8237BFF1A81020924C9C60@phx.gbl> <dd4fhp$huv$1@smc.vnet.net> <dd72pu$3mh$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
In article <dd72pu$3mh$1 at smc.vnet.net>, akhmel at hotmail.com wrote: > Regretfully, you mistyped the expression for the antiderivative and > therefore, when you tried to do the differentiation, it didn't work. > > The correct expression is: > > 1/(a*b)*ArcTanh[(b*Sqrt[r^2 - a^2]) / (a*Sqrt[r^2 - b*2])] Regretfully, you mistyped the expression for the antiderivative and therefore, when you try to do the differentiation, it won't work. > In order to avoid misunderstanding, I describe the argument of ArcTanh > verbally: it is a fraction. The numerator is "b" TIMES sqare root of > "r" squared minus "a" squared. The denominator is "a" TIMES sqare root > of "r" squared minus "b" squared. I hope now there will be no > misunderstanding. Indeed, you will see that that is _not_ what you typed above! Cheers, Paul -- Paul Abbott Phone: +61 8 6488 2734 School of Physics, M013 Fax: +61 8 6488 1014 The University of Western Australia (CRICOS Provider No 00126G) AUSTRALIA http://physics.uwa.edu.au/~paul http://InternationalMathematicaSymposium.org/IMS2005/
- References:
- Some bugs in Mathematica
- From: akhmel@hotmail.com
- Some bugs in Mathematica