<p>Recently I got a notice on <a href="https://stats.stackexchange.com/questions/137518/proof-for-linear-combination-of-multivariate-normal-x/137521#137521">this</a>. This is the first time I have received a notice. I understand comments. Now I am wondering what this "notice on answer" is? I am also interested to know who gives these notices to the answers, because no name is displayed as there would be if someone made a comment. Are the notices used for answers only or are they applicable to questions as well?  </p>
