Re: How to simplify exponents?

*To*: mathgroup at smc.vnet.net*Subject*: [mg67420] Re: How to simplify exponents?*From*: Peter Pein <petsie at dordos.net>*Date*: Fri, 23 Jun 2006 04:31:32 -0400 (EDT)*References*: <e7dr2n$99h$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

wandering.the.cosmos at gmail.com schrieb: > My computations in Mathematica yields some exponents that do not seem > to get simplified automatically, e.g. 2^{4(s-3)+1/2-s/2} > A^{s+2(s/2+4)}. I even tried to do x^n_ -> x^Simplify[n] but it doesn't > work very well. Why is this so and how do I make sure my exponents are > simplified? > > Thanks! > Are you sure, you want a list as exponent? Simplify and ExpandAll work fine: In[1]:= Simplify[2^(4*(s - 3) + 1/2 - s/2)] Out[1]= 2^((1/2)*(-23 + 7*s)) In[2]:= ExpandAll[2^(4*(s - 3) + 1/2 - s/2)] Out[2]= 2^(-(23/2) + (7*s)/2) These Examples work with an exponent-list too. And if you really want a list as exponent (Power has the attribute Listable), simplification appears to happen autamagically: In[3]:= 2^(1 + s*((Range[5] - 4)/2)) Out[3]= {2^(1 - (3*s)/2), 2^(1 - s), 2^(1 - s/2), 2, 2^(1 + s/2)} Peter