Re: inverse command of Series[]
- To: mathgroup at smc.vnet.net
- Subject: [mg8057] Re: [mg8020] inverse command of Series[]
- From: "w.meeussen" <meeussen.vdmcc at vandemoortele.be>
- Date: Mon, 4 Aug 1997 01:47:40 -0400
- Sender: owner-wri-mathgroup at wolfram.com
hi,
Check the DiscreteMath package for Exponential generating functions
In[2]:=
<<DiscreteMath`RSolve`
In[6]:=
Sum[x^n/n!,{n,0,Infinity}]
Out[6]=
x
E
In[8]:=
ExponentialPowerSum[1,{x,0}]
Out[8]=
x
E
and so on ...
wouter.
22:32 2-08-97 -0400, Nguyen N. Anh wrote:
>Hello,
>
>I've written a program in Mathematica and it works quite well. However, after
>convergence it gave as result the following polinomial:
>
>1 + x + x^2/2 + x^3/6 + x^4/24 + x^5/120 + x^6/720 + x^7/5040
>
>I know that this is the power series expansion of function E^x but I want that
>my program recognizes it automatically and outputs the generating function of
>the polinomial calculated ( E^x in this case).
>
>Is there any command or package which can do that ?
>
>Any help will be appreciated
>
>Regards
>
>--
>Nguyen Nam Anh Quebec, Canada
>E-mail: anh at chm.ulaval.ca
>WWW: http://promethium.chm.ulaval.ca/~anh/
>
>
>
>
Dr. Wouter L. J. MEEUSSEN
eu000949 at pophost.eunet.be
w.meeussen.vdmcc at vandemoortele.be