Enrico Gregorio

If you say ``` \font\foo=cmr17 ``` in legacy TeX, the font is loaded globally, so a new declaration for it will not load it again; but the assignment to the...

## XeLaTeX I get the warning ************************************************* * fontspec warning: "icu-feature-not-exist-in-font" * * OpenType feature 'Vertical=RotatedGlyphs' (vrt2) not available for font * 'SimSun' with script '' and language ''. *************************************************...

`\bmod` has always been a fragile command. If you comment out `unicode-math`, add `\listoffigures` and compile with `pdflatex`, the `.lof` file will contain ```latex \contentsline {figure}{\numberline {1}{\ignorespaces Test caption $i...

@joukewitteveen You can redeclare `\mathbb` yourself: ```latex \documentclass{article} \usepackage{amsmath,amssymb} \usepackage{unicode-math} \setmathfont{STIX Two Math} % has a very distinctive Blackboard Bold font \AtBeginDocument{\DeclareMathAlphabet{\mathbb}{U}{msb}{m}{n}} \begin{document} $\mathbb{A}\ne\symbb{A}$ \end{document} ```

Since `\rm` has been deprecated in 1994, I would not bother.

They _are_ letters. If you mean to use ᵥ (U+1D65 LATIN SUBSCRIPT SMALL LETTER V) in place of `_{v}`, don't. If you insist, then ```latex \usepackage{newunicodechar} \newunicodechar{ᵥ}{\ifmmode_{v}\elseᵥ\fi} ``` but don't...

You don't need `\exp_after:wN` \NewDocumentCommand \xmapsto { m } { \mathrel { \Uoverdelimiter \use:c { sym \__um_symfont_tl } "21A6 { \mkern 5mu \scan_stop: #1 \mkern 5mu \scan_stop: } } }...

I see that `\sqrt`, `\cuberoot`, `\fourthroot` and `\longdivision` are marked as `\mathopen` in `unicode-math-tables.tex`. I think that a class marker such as `\mathradical` should be used (analogously to `\mathalpha`, `\mathfence`,...

You should _not_ start with `\cs_new:Npn \My:cn #1 #2`, that's all. If you try ``` \cs_new:Nn \My:cn ``` you get the error message ``` ! LaTeX3 Error: Function '\My:cn' is...

It's not clear why you'd want to use `\cs_set:NpV \MyV:nnn` when `\cs_set:NV \MyV:nnn` works flawlessly. Where's the problem? Without an explicit brace, which is required by `\def` and is not...