Re: Assuming to be a real number is useless even in simple cases?
- To: mathgroup at smc.vnet.net
- Subject: [mg63964] Re: [mg63945] Assuming to be a real number is useless even in simple cases?
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Wed, 25 Jan 2006 08:45:49 -0500 (EST)
- Reply-to: hanlonr at cox.net
- Sender: owner-wri-mathgroup at wolfram.com
You never used a function that would look at the assumptions. Use Simplify, Assuming[Element[x, Reals], Simplify[Im[x]]] 0 Bob Hanlon > > From: Roberto <roberto at pop.it> To: mathgroup at smc.vnet.net > Subject: [mg63964] [mg63945] Assuming to be a real number is useless even in simple cases? > > In[1]:= > Assuming[x\[Element]Reals, Im[x]] > > Out[1]= > Im[x] > > Why it's not zero? > >