I work on a high-contrast sans-serif typeface, but decided to keep basic math operators monoline (+,=,> etc.) But now I don't know how to approach additional math operators and symbols like product, lozenge, delta, ohm, pi, integral, increment, radical, infinite etc. Some of them are basically Greek letters (which implies contrast). Looking at the examples, seems there is no clear convention.
What's your opinion. Maybe apply contrast only on symbols originated from Greek letters and not on the rest, or no contrast at all for all math symbols? Thanks.