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arXiv 0908.2410math.AGmath.AP
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一个Max Noether定理的推广

Generalization of a Max Noether's Theorem

Renato Vidal Martins

摘要:

Max Noether定理断言,如果$\ww$是非奇异非超椭圆射影曲线的对偶层,则自然态射$\text{Sym}^nH^0(ω)\to H^0(ω^n)$对所有$n\geq 1$都是满射。对于Gorenstein非超椭圆曲线也是如此。我们证明了这仍然是真实的近Gorenstein曲线和所有积分非超椭圆曲线的非Gorenstein点是单支的。结果是独立的,有不同的证明。第一个是外在的,第二个是内在的。

英文摘要:

Max Noether's Theorem asserts that if $\ww$ is the dualizing sheaf of a nonsingular nonhyperelliptic projective curve then the natural morphisms $\text{Sym}^nH^0(ω)\to H^0(ω^n)$ are surjective for all $n\geq 1$. This is true for Gorenstein nonhyperelliptic curves as well. We prove this remains true for nearly Gorenstein curves and for all integral nonhyperelliptic curves whose non-Gorenstein points are unibranch. The results are independent and have different proofs. The first one is extrinsic, the second intrinsic.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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