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Re: Subscripts in Content MathML

From: Paul Libbrecht <paul@activemath.org>
Date: Fri, 7 Oct 2005 09:40:59 +0200
Message-Id: <dea32c18358726d0260f3644d9b0e0d4@activemath.org>
To: www-math@w3.org

Le 6 oct. 05, à 22:13, Stan Devitt a écrit :
> 2.  For elipses in sums and sequences I have taken a more formal 
> approach than has  been suggested so far.  I defined a function - 
> roughly
> 	special_seq( base, operand , before_index_low,before_index_high, 
> elipse_token , after_index_low, after_index_high )
> so that
> 	special_seq( a , "+" , 1 , 3 , "..." , n-1 , n )
> can be  mapped to the presentation
> 		a_1 +  a_2 + a_3 + ... + a_{n-1} + a_n
> and to the computational form
> 		Sum( a_i , i=1..n );
> There is no ambiguity (at least no more than usual) for either the 
> computation or presentation.  Of course a transform is required.

This one is real nice!

I understand this as a form of "macro-like-symbol" which includes 
declaring new symbols for the sole purpose of a better presentation. I 
think it has quite a private scope...

 From this, I definitely understand that, in order to go to some 
computational system you need a transformation of your content, right ?
If this is under your control, no issue... but what if you want to 
expose it to the world ?

I know that for search I'd like Sum(a_i, i=1..n) to match this one.
I also know that the content-piece I'd like to be put in my clipboard 
if I want to paste in Maple should not be using special_seq but Sum.

Agreeing with these two possible requirements?
Who's working on such rewrites ?

paul, getting excited
Received on Friday, 7 October 2005 07:41:06 UTC

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