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MathGroup Archive 2004

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Re: make 0*Infinity = 0

  • To: mathgroup at smc.vnet.net
  • Subject: [mg47280] Re: make 0*Infinity = 0
  • From: "Peter Pein" <no at spam.no>
  • Date: Fri, 2 Apr 2004 03:30:27 -0500 (EST)
  • References: <c4ggtp$3ng$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Check[0*Infinity, 0, Infinity::indet]
don't use Off[Infinity::indet] with this, or it doesn't work.

-- 
Peter Pein, Berlin
StringReplace["petsie at arcand.de",
 Rule@@(ToLowerCase@ToString@Head@#&)/@{William&&S,2b||!2b}]

"Daniel Reeves" <dreeves at umich.edu> schrieb im Newsbeitrag
news:c4ggtp$3ng$1 at smc.vnet.net...
> I'm really stumped on how to make 0*Infinity evaluate to 0.
> I've tried all the obvious things, like
>  Unprotect[Infinity];
>  Infinity*0 = 0;
> along with all the variations I can think of using UpSet and
> DirectedInfinity[_], etc.
> Alas, 0*Infinity always comes back with Indeterminate.
>
> Thanks!
> Daniel
>
> -- 
> http://ai.eecs.umich.edu/people/dreeves  - -  google://"Daniel Reeves"
>
> Optimist: The glass is half full.
> Pessimist: The glass is half empty.
> Engineer: The glass is too big.
>
>

Check[0*Infinity, 0, Infinity::indet]
don't use Off[Infinity::indet] with this, or it doesn't work.

-- 
Peter Pein, Berlin
StringReplace["petsie at arcand.de",
 Rule@@(ToLowerCase@ToString@Head@#&)/@{William&&S,2b||!2b}]



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