Intelligent handling of Infinity in Limits

*To*: mathgroup at smc.vnet.net*Subject*: [mg7622] Intelligent handling of Infinity in Limits*From*: Locutus Of The Hair Club for Men <psalzman at landau.ucdavis.edu>*Date*: Fri, 20 Jun 1997 16:15:56 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

dear all, i was trying to do Integrate[ r^2 Exp[-a r^2], {r,0,Infty}] but MMA couldn't simplify a term which clearly was zero. next i tried integrating over {r,0,r} and then took the limit as r->Infty. MMA had the same problem. i'm not interested in the answer since i already know the answer. i'm interested in how to get the answer. i'm sure it's obvious. can someone tell me? peter ps- i just bought the student's MMA 3.0 and MathTensor. i know that the student version of mathtensor is not crippled----is the student version of MMA crippled in any way? -- You can sum some of the series some of the time, But you can't sum all of the series all of the time. -=><=-+-+-=><=-+-+-=><=-+-+-=><=-+-+-=><=-+-+-=><=-+-+-=><=-+-+-=><=-+-+-=><=- I BOYCOTT ANY COMPANY THAT USES MASS ADVERTISING ON THE INTERNET