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Sometimes a lot of good things happen as the comments under an answer to your post. Though we are notified of the answers given or the comments under the body of the post, it seems that we are not ...

I have posted an answer to this question: Most dispersed set of points in a disk?, but do not see any indication that a comment has been left to that answer, if I however use the StackExchange App, ...

Usually, I'm able to address a comment to someone by writing "@[whoever]" before the text; but in a comment to a recent question (Compact, densely ordered spaces) I wasn't able to do this: when I ...