Tight closure and plus closure for cones over elliptic curves

Details Tight closure and plus closure for cones over elliptic curves Tight closure and plus closure for cones over elliptic curves

2002-09-23

arxiv.org/abs/math/0209302v2

Nagoya Math. Journal, 177 (2005)

Mathematics

Commutative Algebra

Some minor changes

Scientific paper

We characterize the tight closure of graded primary ideals in a homogeneous
coordinate ring over an elliptic curve by numerical conditions and we show that
it is in positive characteristic the same as the plus closure.

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