# Misplaced backslashes

I left a comment at Strict ordering on natural numbers but as you can see it says "Misplaced \\". I'm no more allowed to edit it myself, I don't know why. Can someone correct it please? Thanks.

Markdown in comments use a different set of rules than Markdown in posts. In particular, \{ will not be converted to { in comments, so \\{\\emptyset\\} will be left as-is. It is incorrect to place a \\ there in LaTeX, thus the error.