Re: querries
- To: mathgroup at smc.vnet.net
- Subject: [mg119569] Re: querries
- From: David Skulsky <edskulsky at gmail.com>
- Date: Fri, 10 Jun 2011 06:39:21 -0400 (EDT)
- Reply-to: comp.soft-sys.math.mathematica at googlegroups.com
If mu and lambda are both negative, then the expression may not be zero. Consider:
In[9]:= Assuming[{b, \[Lambda], \[Mu]} \[Element]
Reals, (\[Mu] \[Lambda])^b - \[Mu]^b \[Lambda]^b] // Simplify
Out[9]= -\[Lambda]^b \[Mu]^b + (\[Lambda] \[Mu])^b
vs.
In[24]:= Simplify[(\[Mu] \[Lambda])^b - \[Mu]^b \[Lambda]^b,
Assumptions -> {\[Lambda] < 0, \[Mu] > 0}]
Out[24]= 0
You'll get the same result (0) for lambda >0, mu <0 and lambda>0, mu >0.
David