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Re: Coefficient in multivariate series

  • To: mathgroup at smc.vnet.net
  • Subject: [mg3620] Re: Coefficient in multivariate series
  • From: danl (Daniel Lichtblau)
  • Date: Sat, 30 Mar 1996 02:45:19 -0500
  • Organization: Wolfram Research, Inc.
  • Sender: owner-wri-mathgroup at wolfram.com

In article <4itof5$v8 at dragonfly.wolfram.com> Samuel Bengmark  
<samuel at math.chalmers.se> writes:
> I wonder if anyone out there knows how to get mathematica 
> to extract a coefficient of a monomial in a multivariate to
> series or polynomial. For example how do I get mathematica to
> give me the coefficient of x*y*z^3 in (1+x+y)^2*(2+y)*(5+z)^4.
> 
> 

In[1]:= Coefficient[Expand[(1+x+y)^2*(2+y)*(5+z)^4], x*y*z^3]
Out[1]= 120

  In our next release the Expand[] will not be necessary.

Daniel Lichtblau
Wolfram Research, Inc.

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