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arxiv: math/0402179 · v2 · submitted 2004-02-11 · 🧮 math.AC · math.AG

Tight closure and plus closure in dimension two

classification 🧮 math.AC math.AG
keywords closurefiniteplustightalgebraicanswerscasecoincide
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We prove that the tight closure and the graded plus closure of a homogeneous ideal coincide for a two-dimensional N-graded domain of finite type over the algebraic closure of a finite field. This answers in this case a ``tantalizing question'' of Hochster.

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