3 papers
math.AG2020
Properties of the resolution of almost Gorenstein algebras
Giuseppe Zappalà
We study properties of the resolution of almost Gorenstein artinian algebras i.e. algebras defined by ideals such that with Gorenstein ideal and …
math.AC2018
On mixed Hessians and the Lefschetz properties
Rodrigo Gondim, Giuseppe Zappala'
We introduce a new type of Hessian matrix, that we call Mixed Hessian. The mixed Hessian is used to compute the rank of a multiplication map by a power of a linear form in a standa…
math.AG2012
A structure theorem for unions of complete intersections
Alfio Ragusa, Giuseppe Zappala
Using the connections among almost complete intersection schemes, arithmetically Gorenstein schemes and schemes that are union of complete intersections we give a structure theorem…