Re: Thx for your help
- To: mathgroup at smc.vnet.net
- Subject: [mg23743] Re: Thx for your help
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Mon, 5 Jun 2000 01:09:36 -0400 (EDT)
- Organization: Universitaet Leipzig
- References: <8gv8ji$5nf@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi, since Mathematica don't know that x^n*DiracDelta[x]== 0 /; n>0 it can't find that Integrate[Abs[x],x]-> x^2*Sign[x]/2 As book advice *not* a Mathematica book, a mathematics book seems to be more use full. Regards Jens Jos\151 Mar\155a Lasso wrote: > > Hi, > Thx for the answers to my last post, but I have a new question, similar to > the last one, when I try: Integrate[Abs[x],x], there is no result, just the > original input, what I am doing wrong?, I need some advice about a good > book about Mathematica for beginers.Thx again.Best regards > > Jose M Lasso