Let $X$ be a smooth, complex, projective variety. How to prove that if through two general points of $X$ there exists a double line, then $X \cong \mathbb{P}_{\mathbb{C}}^{n}$?
2026-03-25 07:41:04.1774424464
Double lines in $X$, implies $X \cong \mathbb{P}^{n}$
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