Libertinus: Feature request: Style set for telling apart v and nu

[xsrvmy]

Using CM fonts, it is easy to distinguish v and \nu. Unfortunately, with libertinus math, the letters are extremely similar, and it is only possible to tell them apart by comparing them side to side.

Is it possible to introduce a style set that would use a curved v like CM does? Or changing nu to a rounded hook on the left

[alerque]

This sounds like a need we could probably accommodate.

Can you whip up a MWE in LaTeX showing an example formula that illustrates the problem in CM vs. Libertinus Math? Not using much math typesetting personally that would make it a lot easier for me to either work on or even review if somebody else is able to contribute this.

[xsrvmy]

Using unicode-math, here is the output of
$v \nu \symup{v} \symup{\nu} \symbfsf{v} \symbfsf{\nu} \symbfsfit{v} \symbfsfit{\nu}$
on LM (default unicode-math font), STIX2, Pagella, Termes and Libertinus.

The first three examples use a curved v and a sharp nu. Termes uses a round hook on the nu. Libertinus shows no distinguishing features without looking very closely.

I think the best option may actually be rounding out the left hook of the nu like STIX 2 and Termes, or extending it like how one would handwrite the nu character. Changing v would probably require changing w as well, and runs the risk of confusing v and upsilon like CM/LM.