How is it that inverse seems to be used as "multiplicative inverse" in this context? It seems like a really ambiguous term, because it could also be interpreted as either:
inverse of the square root (which is just the squaring operation), or
the inverse of some other binary operator, like addition or anything else...
inverse of the square root (which is just the squaring operation), or
the inverse of some other binary operator, like addition or anything else...