rational surfaces
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Problem 38: Hartshorne II.7.7.
Hartshorne Exercise II.7.5. Some Rational Surfaces. Let $X=\PP{k}{2}$, and let $|D|$ be the complete linear system…
Hartshorne Exercise II.7.5. Some Rational Surfaces. Let $X=\PP{k}{2}$, and let $|D|$ be the complete linear system…