Re: [NTG-context] math: command for absolute value: `\define\abs[1]{\lvert #1 \rvert}` throws `\lvert ->\Udelimiter`.

On Sat, Jun 04 2011, Paul Menzel wrote:

I want to define `\abs` as the command for the absolute value. The following minimal example is also attached.

\define\abs[1]{\lvert #1 \rvert}

Don't ask me why "\define" doesn't work (certainly related to expansion), but "\def" does the job: \def\abs#1{\lvert #1 \rvert} -- Peter