Subalgebras of bigraded Koszul algebras

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We show that diagonal subalgebras and generalized Veronese subrings of a bigraded Koszul algebra are Koszul. We give upper bounds for the regularity of sidediagonal and relative Veronese modules and apply the results to symmetric algebras and Rees rings.
13 pages

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Commutative Algebra, 13A99; 13D99

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http://salesiana.dossiersoluciones.com/handle/123456789/60467

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0011251
 http://arxiv.org/abs/math/0011251

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arXiv