Is there a theorem proof whose accuracy is doubted because it is short?
He told me while chatting with a friend of mine. It's about a mathematician who proves a difficult theorem very briefly and simply. Those who have examined the proof have hesitated to confirm it. "Let's not rush it because it seems too short and simple to be true!"
If this sort of thing did happen, I'm guessing it might be the proof Leroy Milton Kelly gave in 1948 for Sylvester's Line Problem (1893). Because the problem is tricky and Kelly's proof is unexpectedly short. (I have no arguments to support my guess, I am not assertive about it.)
Have you heard of a similar story? What do you think is the reality?