A question was posted on Math.SE late last year, which I noted is very similar to a question posted here on MO. The author seemed to have been somewhat satisfied with the answer given on MO. But the MO question was closed as off-topic and now, deleted.

If it is not too much trouble, can someone with enough privilege to see this deleted question here either copy the answer over to Math.SE, or perhaps post a copy of the answer below so I can copy it to Math.SE? I would also be grateful if a link to the user who posted the original answer is given so proper credit can be given.

Thanks