Sobre o teorema de Max Noether para curvas singulares

Abstract

Max Noether's Theorem states that if $ \ww $ is the dualizing bundle of a non-singular, non-hyperelliptic projective curve, then the natural morphisms $ \text{Sym}^nH^0 (\omega) \to H^0( \omega^n) $ are surjectives for all $ n \geq 1 $. The result has been extended to Gorenstein curves by many different authors in different ways. More recently, it has been proven for curves with projectively normal canonical models and curves whose non-Gorenstein points are at most biramified. Based on these works, we approach the general case and extend the result to integral curves. We also connect the problem with the local structures of Commutative Algebra and derive different characterizations of non-hyperellipticity.