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Can you suggest some negative point in this post

Can one suggest me some negative points in the following post with several downvote https://mathoverflow.net/questions/247716/topological-groupoid-structure-on-a-pair-s3-a Thank you
Ali Taghavi's user avatar
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Down vote without comment

I received a down vote on this question without any comment. Can one help me to understand how this question could be improved? I think that a moral and implicit policy of MO is that a comment shoul …
Ali Taghavi's user avatar