The question
Proofs that every mathematician should know.Proofs that every mathematician should know.
has 142 upvotes (4 down) and was favorited 150 times. The revision history shows that the question was closed by a moderator but with no other close voters listed.
http://math.stackexchange.com/posts/178940/revisionshttps://math.stackexchange.com/posts/178940/revisions
Why was this question closed? Unless there is more information not in the revision history it looks like one user over-ruled the expressed opinion of more than 100 others. I searched the meta and could not find discussion of this closing.
