Just curious: can we know who voted on our answer in Mathematics Stack Exchange?
No, this is not possible. See e.g. this post on Meta Stack Exchange: Is there a way to see who voted on your posts?
No, voting is by design anonymous. Not even ♦ moderators have access to information on individual votes.
Knowing who up- or downvoted your post would likely incite some users to up- resp. downvote the voters' posts, which we want to avoid: Stack Exchange is all about the content, not the users.