Thanks Aditya.

2017-06-02 14:44 GMT-04:00 Aditya Mahajan <adityam@umich.edu>:
On Fri, 2 Jun 2017, Jose Luis Arellano wrote:

Dear list.

What is the correct way to use upright (no italic) font in math mode?

If you want to set this for all symbols:

\setupmathematics[default=normal, ucgreek=normal, lcgreek=normal]

If you want to do this for only a few symbols, then use ${\rm a}a$, etc.

Aditya
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