Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2004
*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 2004

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

Search the Archive

Re: Re: Condition , FullSimplify


I agree, except for the last sentence. Actually, expr/;condition can be 
used wherever patterns can be used. For example:

Simplify[{Im[x],Im[y]},Element[x_/;x=!=y,Reals]]

{0,Im[y]}

Andrzej Kozlowski


On 28 Dec 2004, at 20:30, DrBob wrote:

>>> I find it useful and practical using the first notation.
>
> I don't see how, since it doesn't work! (You wouldn't be asking the 
> question, if it did.)
>
> The problem is that expr/;condition//FullSimplify doesn't mean 
> FullSimplify[expr,cond] in Mathematica; it's really just that simple.
>
> It does mean FullSimplify[expr/;condition], but that's not likely to 
> be of much use. As far as I can tell, expr/;condition is useless 
> without SetDelayed or RuleDelayed.
>
> Bobby
>
> On Mon, 27 Dec 2004 06:41:40 -0500 (EST), sebastian.cohen at gmail.com 
> <sebastian.cohen at gmail.com> wrote:
>
>> Wolfram Staff,
>>
>> I would like to know why the following class of statements don't work
>> given
>>
>> expr /; condition // FullSimplify
>>
>> Although one may express them easily as
>>
>> FullSimplify[expr,cond]
>>
>> I find it useful and practical using the first notation.
>>
>> Is there a way to tell Mathematica at the end expressions both the
>> conditions and to fullsimplify without having to write the whole
>> fullsimplify function?
>>
>> Thanks in advance,
>>
>> Sebastian Cohen S
>>
>>
>>
>>
>
>
>
> -- 
> DrBob at bigfoot.com
> www.eclecticdreams.net
>


  • Prev by Date: Re: including files
  • Next by Date: Re: shuffling 10^8 numbers
  • Previous by thread: Re: Condition , FullSimplify
  • Next by thread: Re: Re: Condition , FullSimplify