Could anyone give me a hint how to show this one:
Let $V$ be a finite set of points in projective space. How to show that the coordinate ring of $V$ is Cohen-Macaulay?
Could anyone give me a hint how to show this one:
Let $V$ be a finite set of points in projective space. How to show that the coordinate ring of $V$ is Cohen-Macaulay?
Proof 1: Regular $\implies$ Cohen-Macaulay.
Proof 2: Artinian $\implies$ Cohen-Macaulay.