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Re: Gamma Simplification

  • To: mathgroup at
  • Subject: [mg30907] Re: [mg30896] Gamma Simplification
  • From: BobHanlon at
  • Date: Mon, 24 Sep 2001 01:49:11 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

In a message dated 2001/9/23 2:29:41 AM, wharke at writes:

>The function e^x Gamma[n,x] is a polynomial in x of degree
>n-1 when n is a positive integer. How do I force Simplify
>to return the polynomial form, particularly when there are
>several occurences in a given expression.

f[n_, x_] := Exp[x]*Gamma[n, x];

Use FunctionExpand then Simplify

Table[{n, f[n, x]}, {n, 1, 7}]//FunctionExpand//Simplify//TableForm

Bob Hanlon
Chantilly, VA  USA

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