If a proof ends with some display mode maths (e.g. 9.1.3 or 9.1.9) then the qed square appears at the end of an extra blank like. This can be avoided by putting \qedhere at the end of the display mode equation. I've been doing this because I think it looks nicer, but wanted to see what you thought before doing too many.
If a proof ends with some display mode maths (e.g. 9.1.3 or 9.1.9) then the qed square appears at the end of an extra blank like. This can be avoided by putting
\qedhere
at the end of the display mode equation. I've been doing this because I think it looks nicer, but wanted to see what you thought before doing too many.