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44 votes
Accepted

Update on "Who owns my MathOverflow posts?"

Your post is not a tangible thing, and bears no concept of a single “owner” who could decide anything and everything concerning the post. Rather, there are multiple rights associated with the post ...
Emil Jeřábek's user avatar
8 votes
Accepted

Writing a bar on top of a number

To give the question an answer so it can be accepted: you can use $\overline{...}$ to get a bar over any letter or digit or group thereof.
David Roberts's user avatar
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