For questions about approaches and techniques for discovering a proof, as opposed to writing it down clearly (which involves proof-writing). Should not be used unless the focus is on the technique of the proof instead of the solution.
- Can I prove there are infinitely many primes without using contradiction?
- What techniques can you use to show that two spaces are homeomorphic?
This tag should not be confused with the proof-verification tag.
See here for a useful set of guidelines for writing a solution.