On 5/15/2016 2:33 PM, Hans Åberg wrote:
On 14 May 2016, at 23:26, Aditya Mahajan <adit...@umich.edu> wrote:
Be careful with empty group in math mode:
\startformula{} -a \stopformula
\startformula\relax -a \stopformula
Maybe a way to distinguish between unary prefix operator “-“, and binary infix
operator “-“: {} is interpreted as an empty operand, thus infix “-", whereas
\relax is removed from the input meaning no operand, so prefix “-“. But \relax can
have sub-/super-scripts, just as {}, and then in both cases, “–“ becomes binary:
\startformula {}^2 - a \stopformula
\startformula \relax^2 - a \stopformula
why not use something more natural unicode
\startformula \zwnj^2 - a \stopformula
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