Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Ragusa, Alfio"'
Autor:
Ragusa, Alfio, Zappalà, Giuseppe
We investigate the standard generalized Gorenstein algebras of homological dimension three, giving a structure theorem for their resolutions. Moreover in many cases we are able to give a complete description of their graded Betti numbers.
Externí odkaz:
http://arxiv.org/abs/1612.02472
Some well-known arithmetically Cohen-Macaulay configurations of linear varieties in $\mathbb{P}^r$ as $k$-configurations, partial intersections and star configurations are generalized by introducing tower schemes. Tower schemes are reduced schemes th
Externí odkaz:
http://arxiv.org/abs/1401.3535
Autor:
Ragusa, Alfio, Zappala, Giuseppe
Using the connections among almost complete intersection schemes, arithmetically Gorenstein schemes and schemes that are union of complete intersections we give a structure theorem for arithmetically Cohen-Macaulay union of two complete intersections
Externí odkaz:
http://arxiv.org/abs/1210.4003
Autor:
Ragusa, Alfio, Zappala, Giuseppe
We deal with the Weak Lefschetz property (WLP) for Artinian standard graded Gorenstein algebras of codimension $3.$ We prove that many Gorenstein sequences force the WLP for such algebras. Moreover for every Gorenstein sequence $H$ of codimension 3 w
Externí odkaz:
http://arxiv.org/abs/1112.1498
Autor:
Ragusa, Alfio, Zappala, Giuseppe
It is known that all complete intersection Artinian standard graded algebras of codimension 3 have the Weak Lefschetz Property. Unfortunately, this property does not continue to be true when you increase the number of minimal generators for the ideal
Externí odkaz:
http://arxiv.org/abs/1003.4106
Autor:
Ragusa, Alfio, Zappala, Giuseppe
We provide a structure theorem for all almost complete intersection ideals of depth three in any Noetherian local ring. In particular, we find that the minimal generators are the pfaffians of suitable submatrices of an alternating matrix. From the gr
Externí odkaz:
http://arxiv.org/abs/1002.3026
Autor:
RAGUSA, ALFIO, ZAPPALÀ, GIUSEPPE
Publikováno v:
Journal of Commutative Algebra, 2017 Oct 01. 9(3), 423-439.
Externí odkaz:
https://www.jstor.org/stable/26174816
Autor:
Ragusa, Alfio, Zappalà, Giuseppe
Publikováno v:
In Journal of Pure and Applied Algebra January 2016 220(1):278-291
Publikováno v:
In Journal of Pure and Applied Algebra June 2015 219(6):2260-2278
Publikováno v:
In Journal of Pure and Applied Algebra October 2013 217(10):1955-1966