On sites like Physics SE or Mathematics SE, it is not uncommon that you have to write formulas in the question title. I know this is discouraged because most people don't search for:
"How can it be that Doppler Factor $k=\frac{1}{k}$?"
(note the last MathJax part) on Google.
However, it sometimes is necessary. In these situations, I would consider a preview (like we have with the question body) to be useful. As of now, you have to hope that everything is correct, post the question and might have to find out that your beautiful equations renders like a mess because you forgot a }
.
So, can we get a preview for titles when writing questions?
<!--- How can it be that Doppler Factor $k=\frac{1}{k}$? -->
before you post? Or is the title renderer different from the post renderer?