Re: $Assumptions
- To: mathgroup at smc.vnet.net
- Subject: [mg92656] Re: $Assumptions
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Thu, 9 Oct 2008 06:39:07 -0400 (EDT)
- Organization: Uni Leipzig
- References: <gci2ia$ta$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
Hi, and option in *not* an assumption. Assumptions are for symbols/variables options are a way to do something. Use SetOptions[] Regards Jens Ruth Lazkoz S=E1ez wrote: > Dear all, > > I seem to be unable to change some default options globally. > > At the top of my notebook I have > > $Assumptions = {MaxRecursion -> 30, AccuracyGoal -> 10}; > > Then we I evaluate NIntegrate[Exp[-x^2], {x, 20., 40.}] > I get 4.78196*10^-176 > > But if I evaluate NIntegrate[Exp[-x^2], {x, 20., 40.}, MaxRecursion ->= 30, > AccuracyGoal -> 10] > I get quite a different value, 1.36703*10^-177 > > I had the same problem trying to change the options for fonts in plots,= > and then I had to add the options I wanted > in every plot, I mean evaluation something like $TextStyle ={whatever= } > before doing the plots did not work. > > Hope you can help me. Thanks, > > Ruth Lazkoz >