Math upright Latin and Greek styles

Mon May 16 03:05:11 CDT 2016

> On 16 May 2016, at 03:30, Philippe Verdy <verdy_p at wanadoo.fr> wrote:
> 
> isn't it specified in TeX using a font selection package instead of the default one? Also the only upright letters I saw was for inserting normal text (not mathematical symbols) or comments/descriptions, or when using the standardized "monospace", or "serif" font (which are not italic by default).

Most use a macro package like ConTeXt, which is more recent and modern than LaTeX, and it is not difficult to change so that the Basic Latin produces math upright style. But legacy is that it is used for math italic, and it is hard to change that legacy.