Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2005
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2005

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: FullSimplify again ...

  • To: mathgroup at smc.vnet.net
  • Subject: [mg59162] Re: FullSimplify again ...
  • From: dh <dh at metrohm.ch>
  • Date: Sun, 31 Jul 2005 01:30:37 -0400 (EDT)
  • References: <dcf3d4$lgl$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi Detlef,
That is not strange, but WRONG. Wolfram should take notice.
consider:
Product[(5-i)/5,{i,1,n}]
gives
(-1/5)^n Pochhammer[-4, n]
this is nothing else than another "noble" way to write the product and 
is correct. Hoever, FullSimplify "simplifies" this to zero, what is 
definitly wrong.

sincerely, Daniel

Detlef Müller wrote:
> Hello.
> I happened to type the following lines:
> 
> 
> 
> In[15]:= f=FullSimplify[Product[(5-i)/5,{i,1,n}]]
> Out[15]= 0
> 
> In[17]:= Product[(5-i)/5,{i,1,n}]/.(n->4)
> Out[17]= 24/625
> 
> Strange, isn't it?
> 
> Version Number: 5.1.1.0
> Platform: X
> 
> Greetings,
>    Detlef
> 


  • Prev by Date: Re: FullSimplify again ...
  • Next by Date: pairs and subsets challenge
  • Previous by thread: Re: FullSimplify again ...
  • Next by thread: Re: FullSimplify again ...