# II.2.2

219,373pages on
this wiki

This problem has Hartshorne Height 2 and volume 2. II.2.1 can be used to solve this.

### HAPPY

For $x \in U \subset X$ know there is an affine containing $x$.

• Use that distinguished affines form a base for the topology(bottom page 70 Hartshorne) of affines to show something like $x \in D_f \subset \mbox{Spec} A \subset X$ and $D_f \subset U$.
• The result follows from II.2.1.