Hi, On Mon, May 1, 2023 at 5:27 PM Stefan Haller via ntg-context wrote:

Hi all,

I wanted to define a custom math function (similar to log etc.) for argmax. However, I wanted to have a small space between "arg" and "max" and limits should work properly. I am using a up-to-date LMTX installation.

Without the first constraint it's easy:

...

% old way: \definemathcommand[argmax][limop]{\mfunction[argmax]} % new way, discoverd by looking into math-def.mkxl \definemathfunction[argmax]

However, both methods do not work if I want to have "arg\,max" printed (error about \endcsname missing). With mkiv the first method works and can also be found in the wiki[1].

What's the current way to define such a custom math function?

Thanks! Stefan

[1]: https://wiki.contextgarden.net/Math/functions

This works here (but maybe there should be a simpler way): \definemathfunction [argmax] [mathlimits=auto] \setupmathlabeltext [en] [argmax=arg\sixperemspace max] \startTEXpage[offset=1ts] \im{ \argmax_{a\in A} f(a) } \blank[big] \dm{ \argmax_{a\in A} f(a) } \stopTEXpage /Mikael