I had to compute a Laurent series, and happened to obtain a correct result by certain manipulations that mathematicians (and even many physicists) would completely disapprove. I suspected that there must be a deeper reason for this, and asked it in Math. SE:
Then, in one of the comments, it has been brought up that physicists may have better insights to this kind of issue. I agreed with this suggestion, and considered posting the same question in Phys. SE; however, I thought it may be off-topic here.
I wonder what are other members' opinions on whether I should copy-paste this question to Phys. SE or leave it in Math. SE?