# Figuring out name of result / theorem

I had made a question here asking about a result mentioned in a book I was reading whose theorem I didn't know. One of the comments gave the right name of the theorem and proof, I posted that as a self answer to my question because I thought others would find it helpful. However, my answer is now deleted.

So, if one asks for a theorem without knowing its name what is the correct approach to answering such a question? Particularly when the theorem has a standard proof which can be found on the internet.