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Re: Infinite Series Error - Bug?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg124571] Re: Infinite Series Error - Bug?
  • From: clashton <clashton at gmail.com>
  • Date: Wed, 25 Jan 2012 07:03:53 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <jflvs1$jpc$1@smc.vnet.net>

Thanks to everyone who responded with suggestions and fixes.

Jimmy

On Jan 24, 5:06 am, clashton <clash... at gmail.com> wrote:
> Can anyone explain why evaluating the following expression gives an
> error?
>
> Sum[q^(-6 + 4*n)/(1 - q^(-5 + 4*n)), {n, 0, Infinity}] /. {q -> 0.1}
>
> None of the denominators are 0 (would only happen if -5 + 4*n=0, which
> is impossible for an integer n, yet I get an error message "Infinite
> expression 1/0 encountered" (several times in fact).
>
> Any help on a work around greatly appreciated.
>
> (Please reply to my personal e-mail also).
>
> Thanks,
>
> Jimmy




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