5 Oct
2009
5 Oct
'09
8:35 p.m.
=Dan Asimov
=Andy
After all, English mathematics routinely uses i as a variable in subscripts, and as the square root of -1, and that never seems to be a problem.
I don't have any info about your other comments, but I can confirm that in English mathematics where the (or a) square root of -1 plays an important role, the subscript i (for an integer) is usually avoided.
Moreover, there's some element of the engineering world that eschews i in favor of j.