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MathGroup Archive 2002

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RE: How to specify a parameter

  • To: mathgroup at smc.vnet.net
  • Subject: [mg33750] RE: [mg33747] How to specify a parameter
  • From: "Curt Fischer" <cfisher at bio.titech.ac.jp>
  • Date: Thu, 11 Apr 2002 02:14:03 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Dear Zhu:

......Original Message......
From: Guojun Zhu [mailto:gzhu1 at uiuc.edu] 
To: mathgroup at smc.vnet.net
Subject: [mg33750] [mg33747] How to specify a parameter

I want to do some integrate with some parameters.  Those integrate can
only
be done if those parameters are only real or only positive.  How to
specify
it in the integrate?  Sometimes Mathmatica even don't know whether my
parameters are matrix or number or express. How to specify it?

<snip>
.......end message......

Use the Assumptions option in Integrate.  Look in the help browser under
"Definite Integrals".  Example:

In[23]:= 
Integrate[x^n, {x, 0, 1}, Assumptions -> (n > 2)]

Out[23]= 
\!\(1\/\(1 + n\)\)

This option only works with definite integrals.  If you want the
indefinite integral, you will have to try something else.
--
Curt Fischer
Tokyo Institute of Technology
Dept. of Bioengineering




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