Re: how to test if 2 expressions are the same? Mathematica 5.0
- To: mathgroup at smc.vnet.net
- Subject: [mg46145] Re: how to test if 2 expressions are the same? Mathematica 5.0
- From: Harold.Noffke at wpafb.af.mil (Harold Noffke)
- Date: Sat, 7 Feb 2004 23:36:01 -0500 (EST)
- References: <bvt135$oj5$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Steve: After reviewing the postings up to 2004-02-06, a closing example might help. If you use Reduce (modified in 5.0), Mathematica 5.0.1 will tell you its assumptions if it prints an answer ... In[1]:= Reduce[ a*Log[x] - Log[x^b] == 0, x, Reals ] Out[1]= b==a && x>0 || x==1 In[2]:= Reduce[ a*Log[x] - Log[x^a] == 0, x, Reals ] Out[2]= x>0 I tried these reductions with Complexes instead of Reals, but Reduce got hung and I terminated it after 30 minutes with no output. Regards, Harold