Re: Re: Help for an integral

*To*: mathgroup at smc.vnet.net*Subject*: [mg57312] Re: [mg57274] Re: Help for an integral*From*: "Frank M" <frankm60606 at gmail.com>*Date*: Tue, 24 May 2005 05:12:51 -0400 (EDT)*Reply-to*: <frankm60606 at gmail.com>*Sender*: owner-wri-mathgroup at wolfram.com

Most integrals of e^-x^2 should resolve out to a function of the cumulative standard normal distribution. This has many simple 5-7 term algebraic approximations, although you are right there is not close form or analytic solution. Is there a way to force Mathematica to use this in a solution? I ask because I want to develop the standard models using Mathematica and then branch out into non-standard models. Frank Chicago, IL -----Original Message----- From: meznaric [mailto:meznaric at gmail.com] To: mathgroup at smc.vnet.net Subject: [mg57312] [mg57274] Re: Help for an integral Not even simple e^-x^2 can be integrated exactly between finite intervals. You could try writing a function of a that will return a numerical value of the integral (just use NIntegrate). Sebastjan