On 03/05/2011 03:58 PM, Philipp Stephani wrote:
There surely exists a reason why Microsoft chose to leave out the three parameters delim1, delim2, and sub2.
>Perhaps they thought that distinguishing between \left(1 \atop 2\right) > and 1 \atopwithdelims() 2 would be too surprising and seldom relevant. > I think better than guessing correct parameter values would be > to do the equivalent of \left(1 \atop 2\right) if the user requested
1 \atopwithdelims() 2 and the parameters are undefined.
I already discussed this issue in my paper "OpenType Math illuminated" http://www.tug.org/TUGboat/tb30-1/tb94vieth.pdf on p.28. I essentially came to the same conclusions: "In the absence of a better solution, it may be best to simply avoid using \atopwithdelims with OpenType math fonts in the new TEX engines and to redefine user-level macros (such as \choose) in terms of \left and \right delimiters." Regards, Ulrik.
