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arxiv: 0812.3355 · v1 · submitted 2008-12-17 · 🧮 math.RA · math.AG

The Dixmier-Moeglin equivalence for twisted homogeneous coordinate rings

classification 🧮 math.RA math.AG
keywords sigmaalgebrascoordinatedixmier-moeglinfieldhomogeneousprimitiveprojective
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Given a projective scheme $X$ over a field $k$, an automorphism $\sigma$ of $X$, and a $\sigma$-ample invertible sheaf $L$, one may form the twisted homogeneous coordinate ring $B = B(X, L, \sigma)$, one of the most fundamental constructions in noncommutative projective algebraic geometry. We study the primitive spectrum of $B$, as well as that of other closely related algebras such as skew and skew-Laurent extensions of commutative algebras. Over an algebraically closed, uncountable field $k$ of characteristic zero, we prove that that the primitive ideals of $B$ are characterized by the usual Dixmier-Moeglin conditions whenever the dimension of $X$ is no more than 2.

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