Re: Integration Problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg126363] Re: Integration Problem*From*: Sseziwa Mukasa <mukasa at gmail.com>*Date*: Thu, 3 May 2012 22:24:31 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <201205030834.EAA29972@smc.vnet.net>

Numerical precision, the first is done in exact precision, the second using machine floating point precision. On May 3, 2012, at 4:34 AM, Michael Musheghian <michael.musheghian at gmail.com> wrote: > Greetings! > > I found that evaluation of this 2 integrals yield a bit different result. What could be the reason? > > Integrate[E^(-1/10 ((1 + r2z)^2)), {r2z, -Infinity, Infinity}] > > Integrate[E^(-0.1 ((1 + r2z)^2)), {r2z, -Infinity, Infinity}] >

**References**:**Integration Problem***From:*Michael Musheghian <michael.musheghian@gmail.com>