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MathGroup Archive 2007

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Trouble with double factorial and an infinite product

  • To: mathgroup at smc.vnet.net
  • Subject: [mg84334] Trouble with double factorial and an infinite product
  • From: giovanni resta <g.restaCUT at CUTiit.cnr.it>
  • Date: Wed, 19 Dec 2007 04:18:38 -0500 (EST)

A collegue of mine says that evaluating this

Product[1+1/n!!,{n,Infinity}]

quickly kills the kernel in Mathematica 6.
(but the same with {n,2,Infinity} does not)

(The symbol n!! denotes the "double factorial" not
the repeated application of factorial, n!!=n(n-2)(n-4)... (1 or 2).)

In previous versions it seems to me that it simply
returns it unevaluated.

I'm just curious to know if it is a problem in his installation
or a little bug.
giovanni


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