Re: bug in Mathematica?
- To: mathgroup at smc.vnet.net
- Subject: [mg122676] Re: bug in Mathematica?
- From: "Dr. Wolfgang Hintze" <weh at snafu.de>
- Date: Sat, 5 Nov 2011 04:48:33 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <j90hep$sp5$1@smc.vnet.net>
"Hansruedi Widmer" <widmer at baden.ch> schrieb im Newsbeitrag news:j90hep$sp5$1 at smc.vnet.net... > Hi Everyone > > > The code > > Sum[Binomial[m, j], {j, 1, m - 1}] > > produces the correct value -2+2^m. > > > But the code > > Product[Binomial[m, j], {j, 1, m - 1}] > > creates the wrong value of zero. Does anyone have an explanation for > why > this is happening? > > > Thanks and best regards > > Hansrued Widmer > > > > I don't see a zero, my version simply does not evaluate the product in symbolic form. But the values are ok: (Product[Binomial[#1, j], {j, 1, #1 - 1}] & ) /@ Range[10] {1, 2, 9, 96, 2500, 162000, 26471025, 11014635520, 11759522374656, 32406091200000000} Hope this helps Best regards, Wolfgang