[Jprogramming] Re : Sigma notation

[Joey K Tuttle]

Another good reference on notation is the Graham - Knuth - Patashnik 
book CONCRETE MATHEMATICS a Foundation for Computer Science  and the 
associated Concrete Math Companion by Ken Iverson. Chapter two of the 
respective books are on summation and notation.

The Iverson book is available to read in the j wiki - the other one for 
around $25 used, or perhaps at a library.

On 2012/12/21 23:25 , Roger Hui wrote:
>> Lambda considered harmful?  LOL
>
> No, sigma considered harmful.  In conventional notation there's big sigma
> for summation and big pi for product.  But how do you do max insert (>./)?
> Min insert (<./)? And insert (^./)?  Etc.
>
> Infinite series (products, etc.) best done by having infinite vectors.  See
> *Remembering Eugene
> McDonnell*<http://www.jsoftware.com/papers/eem/eemapl2010.htm>
>
>      i. 4
>   0 1 2 3
>
>      i. _
>   0 1 2 3 4 5 ...
>
>      +/ 3 ^ - i. _
>   1.5
>
>
> and *Bring Something Beautiful* <http://archive.vector.org.uk/art10500390> .
>
>
> On Fri, Dec 21, 2012 at 11:08 PM, Alex Giannakopoulos <
> aegean at blueyonder.co.uk> wrote:
>
>> Very nice, Linda, thanks.
>> That's just the example I needed.
>>
>> I think I'm beginning to get the 'geist' of it now!
>>
>> (Lambda considered harmful?  LOL)