- From: Frédéric WANG <fred.wang@free.fr>
- Date: Fri, 12 Mar 2010 17:52:22 +0100
- To: "www-math@w3.org" <www-math@w3.org>
I'm still not sure what is the correct rendering for madruwb...
Since the "right angle" notation seems common, I guess it is reasonable
to implement it as the equivalent of "right bottom"?
> Hello,
>
> While discussing with Azzeddine Lazrek about the madruwb notation, he
> told me that there are several variants for drawing the symbol:
>
> - The one given in the MathML 3 spec is with a lam letter:
> http://www.w3.org/TR/MathML3/image/madruwb12.png
> - However, it seems that a "right angle" is also common:
> http://upload.wikimedia.org/wikipedia/en/9/95/Arabic_mathematical_factorial.PNG
>
> - Apparently, the "right angle" can also be oriented the other
> direction. Azzedine mentioned “Florian Cajori, A History of
> mathematical notations, Vol. 2” , p. 74 (notation used in 1827).
>
> I wonder whether the direction of the right angle depends on the
> "overall directionality" of formulas... Also, I'm not sure whether
> these right angle notations are exactly equivalent to "right bottom"
> and "left bottom". Maybe some arabic people can tell us more about
> these variants of madruwb and whether it would be interesting to add
> new values for the "notation" attribute of menclose...
>
> Frédéric Wang
Received on Friday, 12 March 2010 16:49:55 UTC