First question: When the integral symbols were encoded in Unicode there was discussion of the fact that these were deliberately unifying an upright and a slanted style of integral.
Now, I'm pretty sure that I've seen both styles in print at some point, but I can't seem to find any TrueType or OpenType fonts that support the slanted style. Or, I may just not know where to look. Is this style still in use anywhere, and do people make or maintain fonts for it? Second question: When the mathematical relations were encoded there were variants that were unified where the sole difference was something subtle like a slant of one of the lines. However, these variants were also given Standardized Variation Sequences. Are there any fonts that contain glyphs for these variant forms? Either as replacement for the more typical forms, or as alternate glyphs? Again, I may simply not know where to look. A. PS: should these symbols exist in non-Truetype fonts I'd be interested in pointers as well, but preferably from someone who would know how to convert them into TrueType format.