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
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