Restrict computations to Reals
- To: mathgroup at smc.vnet.net
- Subject: [mg5882] Restrict computations to Reals
- From: sasrbk at unx.sas.com (Bart Killam)
- Date: Sun, 2 Feb 1997 01:32:04 -0500
- Organization: SAS Institute Inc.
- Sender: owner-wri-mathgroup at wolfram.com
I am evaluating the normal integral with general
parameters mu and sigma:
Integrate[(1/Sqrt[2Pi])]Exp[(x-mu)/(2sigma^2)],{-Infinity,Infinity}]
One of the answers is correct: Sqrt[sigma^2]/sigma,
the general answer is left in integral form because
Mathematica assumes sigma is a complex number.
How do I tell Mathematica that I am only considering cases where
mu and sigma are reals, so the general case is skipped, and
the correct answer is reduced to 1 ?
Thanks for any help.
--
Bart Killam Work: 919-677-8000 x7538
SAS Institute Inc. Fax: 919-677-8224
SAS Campus Dr., R5215 Email: sasrbk at unx.sas.com
Cary NC 27513-8000