Re: Re: error with Sum and Infinity
- To: mathgroup at smc.vnet.net
- Subject: [mg102464] Re: [mg102437] Re: error with Sum and Infinity
- From: DrMajorBob <btreat1 at austin.rr.com>
- Date: Mon, 10 Aug 2009 04:15:06 -0400 (EDT)
- References: <h5bk64$hlm$1@smc.vnet.net> <200908070932.FAA15211@smc.vnet.net>
- Reply-to: drmajorbob at bigfoot.com
> Options[Sum] returns {} On the plus side, searching via ? *Sum*
> reveals the presence of Global`SymbolicSumThreshold but with no
> information on it.
It's odd that ?*Sum* would reveal this thing, since
?SymbolicSumThreshold
and
?"SymbolicSumThreshold"
do not.
In fact, at my machine, ?*Sum* does NOT reveal it.
$Version
"7.0 for Mac OS X x86 (64-bit) (February 19, 2009)"
> 2. I assume you are implicitly agreeing with me that it is
> unsatisfactory to require any user to guess at the existence, name, and
> effect of an undocumented global flag. But you can't bring yourself to
> say so.
Actually, I doubt he agrees at all.
Bobby
On Sun, 09 Aug 2009 05:06:32 -0500, Richard Fateman
<fateman at cs.berkeley.edu> wrote:
> Andrzej Kozlowski wrote:
>> On 8 Aug 2009, at 02:16, Richard Fateman wrote:
>>
>> <attempt at humor snipped>
>>
>> he or she can
>> always evaluate
>>
>> "SymbolicSumThreshold" /. SystemOptions[]
>> 1000000
>>
>> which, I think, deals with the rest of your post.
>>
>> Andrzej
>
> I assumed there was some name for that magic number, and now you tell me
> this is the name. Thanks.
>
> 1. In the Alphabetical List of functions and other objects in
> Mathematica, available as guide/AlphabeticalListing in the online manual
> for version 6.0, there is no appearance of SymbolicSumThreshold.
> Options[Sum] returns {} On the plus side, searching via ? *Sum*
> reveals the presence of Global`SymbolicSumThreshold but with no
> information on it.
>
> 2. I assume you are implicitly agreeing with me that it is
> unsatisfactory to require any user to guess at the existence, name, and
> effect of an undocumented global flag. But you can't bring yourself to
> say so.
>
>
> RJF
>
--
DrMajorBob at bigfoot.com
- References:
- Re: error with Sum and Infinity
- From: Richard Fateman <fateman@cs.berkeley.edu>
- Re: error with Sum and Infinity