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Re: Trouble with double factorial and an infinite product

  • To: mathgroup at smc.vnet.net
  • Subject: [mg84347] Re: Trouble with double factorial and an infinite product
  • From: dh <dh at metrohm.ch>
  • Date: Thu, 20 Dec 2007 00:01:07 -0500 (EST)
  • References: <fkaoir$du9$1@smc.vnet.net>


Hi Giovanni,

I can confirm this.

"6.0 for Microsoft Windows (32-bit) (June 19, 2007)"

Daniel



giovanni resta wrote:

> 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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