Re: Special Prime Product
- To: mathgroup at smc.vnet.net
- Subject: [mg53403] Re: Special Prime Product
- From: Paul Abbott <paul at physics.uwa.edu.au>
- Date: Mon, 10 Jan 2005 00:13:46 -0500 (EST)
- Organization: The University of Western Australia
- References: <cro3ga$hgo$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
In article <cro3ga$hgo$1 at smc.vnet.net>,
"Gilmar" <gilmar.rodriguez at nwfwmd.state.fl.us> wrote:
> I'm attempting to form a product:
> _____
> | | (p-2)
> | | -------
> | | (p-1)
> p Prime, p|n
>
> I call the program:
>
> << NumberTheory`NumberTheoryFunctions`
> and use the function "PrimeFactorList" in it, to build
> the following module:
>
> specpriprod[n_]:=
> Module[{v},v=Product[(primeFactorList[n][[i]]-2)/(primeFactorList[n][[i]]-2),
> {i,Length[PrimeFactorList[n]]}];v]
>
> specpriprod is an abbreviation for "Special Prime Product".
>
> When I evaluate:
> Table[{n,specprimprod[n]},{n,4,100,2}]
>
> I only get specprimprod[n] = 0 for n even between 4 and 100.
> Help! and Thank you for your help!
>
Others have pointed out the error in your code. I would just like to add
that at
http://mathworld.wolfram.com/PrimeProducts.html
you will find some relevant formulas along with a downloadable
Mathematica Notebook.
Cheers,
Paul
--
Paul Abbott Phone: +61 8 6488 2734
School of Physics, M013 Fax: +61 8 6488 1014
The University of Western Australia (CRICOS Provider No 00126G)
35 Stirling Highway
Crawley WA 6009 mailto:paul at physics.uwa.edu.au
AUSTRALIA http://physics.uwa.edu.au/~paul