Does anybody know a textbook or journal reference which contains the proof of the "well-known" fact that a smooth projective curve minus a point (or even finitely many points) is affine? The proof appears here on math.SE multiple times, in Ravi Vakil's notes (but not in his book, at far as I can tell) and other discussion forums. I need something citable. The case of elliptic curves would suffice.
2026-03-30 13:37:25.1774877845
Reference for: smooth projective curve minus a point is affine
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This is practically Sasha's proof, but you can cite Proposition 5 in: