Questions about assumptions
- To: mathgroup at smc.vnet.net
- Subject: [mg101749] Questions about assumptions
- From: Alexander Erlich <alexander.erlich at gmail.com>
- Date: Thu, 16 Jul 2009 08:17:26 -0400 (EDT)
Hello, I would like to make assumptions like e.g. Element[a,Reals] or b>0 or simlar ones global in order to avoid using Refine with long assumption lists every tome. For this purpose, I've found $Assumptions. But I encountered the following problem: In[5]:= $Assumptions = Element[g, Reals] Out[5]= g \[Element] Reals In[6]:= Conjugate[g] Out[6]= Conjugate[g] Why didn't Mathematica just return g? Maybe, there is a different, or even better way to make assumptions global to the whole notebook, so that they are considered automatically (and without Refine or similar)? Regards, Alexander
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