Re: Integration Problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg126367] Re: Integration Problem*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Thu, 3 May 2012 22:25:53 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <201205030834.EAA29972@smc.vnet.net>*Reply-to*: murray at math.umass.edu

The reason is that 1/10 is an exact number whereas 0.1 is an approximate real number. On 5/3/12 4:34 AM, Michael Musheghian 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}] > -- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 549-1020 (H) University of Massachusetts 413 545-2859 (W) 710 North Pleasant Street fax 413 545-1801 Amherst, MA 01003-9305

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