Can we write $q(F)_i$ (without an additional pair of parentheses) for $(q(F))_i$?
Maybe, it would be better $q(F)(i)$?
is there any other way to understand $q(F)_i$? I can't think of any, and my personal taste is as little parentheses as possible. – yohBS Mar 20 '12 at 21:27
Is this something for which $q_i(F)$ is inappropriate? Unless there is a fear of misinterpreting for components or partials, that's my preference. Then $q(F)_i$. – mixedmath Mar 20 '12 at 23:30