[floodle]

I did often in my degree, not for multiplication but the cross product

[TheRealPomax]

sure, but in that context there's no ambiguity (and technically, it's not the "times" symbol, that's the cross product symbol). We don't really use "x" in vector maths, it's all "a", "b", "v1", "v2", etc =)

(at best you might use a .x subscript for 3D graphics but when did anyone ever do that by hand)