$Assumptions

*To*: mathgroup at smc.vnet.net*Subject*: [mg92609] $Assumptions*From*: Ruth Lazkoz Sáez <ruth.lazkoz at ehu.es>*Date*: Wed, 8 Oct 2008 06:24:50 -0400 (EDT)

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