Re: Re: error with Sum and Infinity

*To*: mathgroup at smc.vnet.net*Subject*: [mg102409] Re: [mg102387] Re: error with Sum and Infinity*From*: Andrzej Kozlowski <akoz at mimuw.edu.pl>*Date*: Sat, 8 Aug 2009 04:38:55 -0400 (EDT)*References*: <h5bk64$hlm$1@smc.vnet.net> <200908070932.FAA15211@smc.vnet.net> <29EAD82D-4D06-4036-923E-97DD7B2EDC46@mimuw.edu.pl> <4A7C6176.9060002@cs.berkeley.edu>

On 8 Aug 2009, at 02:16, Richard Fateman wrote: > Andrzej Kozlowski wrote: >> >> On 7 Aug 2009, at 18:32, Richard Fateman wrote: >> >>> Well, see Elton TeKolste's remarkable post. >>> I doubt that the "feature" he illustrates would be known even by >>> most >>> experienced users. >> >> >> Well, you are wrong. For example, check this post (about the >> fastest way of adding up a billion numbers) >> >> http://forums.wolfram.com/mathgroup/archive/2007/Mar/msg00565.html >> >> and the rest of the discussion. > > I think you flatter yourself and mathgroup to think that "most > experienced users" will have read your post from March, 2007. Are you saying that there are "experienced users" who have not read all my posts? Impossible! However, should such a strange phenomenon really exist, he or she can always evaluate "SymbolicSumThreshold" /. SystemOptions[] 1000000 which, I think, deals with the rest of your post. Andrzej > I just checked the documentation and I see no notice of that magic > number (though maybe it is there somewhere and I missed it??). > > > Is there a way of finding that magic number without experimentation > or "insider" knowledge? Would "most experienced users" know that? > > If it is not in the documentation, the rules of the game mean that > WRI is free to change that magic number, or eliminate it, without > notice, so any experienced user would be loathe to take advantage of > it for fear that any program utilizing it would cease to work in a > new version. > > RJF

**References**:**Re: error with Sum and Infinity***From:*Richard Fateman <fateman@cs.berkeley.edu>