Several months ago, I asked a question about whether or not a certain operation was used in mathematics. I then went on to explain this operation in some amount of detail. I recently decided to come up with a (surprisingly simple and elegant) proof that my operation does what I claim it does, and I would like to add it to my question in some way.
The proof, however, doesn't add anything to the question, but it's not an answer to my question, either. That being said, I feel as though the proof would add to the discussion.
What should I do in this situation? Would it be frowned upon if I edited my question in a way that made my proof on-topic?