When you read a formula aloud you say "r and r-star are related by this formula".
If you write this formula down you normally write an r with a six-handed star, which would actually be an asterisk and not star (with 5 sharp hands) because it's easier to draw by hand.
But what to do when typing this formula in LaTeX? Should I set it as I pronounce it?
r^\star = a r
Or as I write it by hand?
r^\ast = a r
\ast always do the same as
r^\ast == r^* %???
Is one (
\ast) simply wrong (typographically or semantically) or is it just a matter of personal preference?