       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:= Simplify[2^(4*(s - 3) + 1/2 - s/2)]
Out= 2^((1/2)*(-23 + 7*s))
In:= ExpandAll[2^(4*(s - 3) + 1/2 - s/2)]
Out= 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:= 2^(1 + s*((Range - 4)/2))
Out= {2^(1 - (3*s)/2), 2^(1 - s), 2^(1 - s/2), 2, 2^(1 + s/2)}

Peter

```

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