scholarly journals Hilbert functions of irreducible arithmetically Gorenstein schemes

2004 ◽  
Vol 272 (1) ◽  
pp. 292-310 ◽  
Author(s):  
Nero Budur ◽  
Marta Casanellas ◽  
Elisa Gorla
2001 ◽  
Vol 162 ◽  
pp. 111-125 ◽  
Author(s):  
Alfio Ragusa ◽  
Giuseppe Zappalà

It is completely known the characterization of all Hilbert functions and all graded Betti numbers for 3-codimensional arithmetically Gorenstein subschemes of ℙr (works of Stanley [St] and Diesel [Di]). In this paper we want to study how geometrical information on the hypersurfaces of minimal degree containing such schemes affect both their Hilbert functions and graded Betti numbers. We concentrate mainly on the case of general hypersurfaces and of irreducible hypersurfaces, for which we find strong restrictions for the Hilbert functions and graded Betti numbers of their subschemes.


1989 ◽  
Vol 105 (3) ◽  
pp. 441-446 ◽  
Author(s):  
David Kirby

Throughout R will denote a commutative ring with identity, A,B etc. will denote ideals of R, and E will denote a unitary R-module. We recall from [5] the definition of homological grade hgrR(A;E) as inf{r|ExtRr(R/A,E) ≠ 0}, and we allow both hgrR(A;E) = ∞ (i.e. ExtRr(R/A,E) = 0 for all r) and AE = E. For the most part E will be Noetherian, in which case hgrR(A;E) coincides with the usual grade grR(A;E) which is the supremum of the lengths of the (weak) E-sequences contained in A (see [7], for example).


2009 ◽  
Vol 321 (10) ◽  
pp. 2705-2715 ◽  
Author(s):  
Fabrizio Zanello
Keyword(s):  

2000 ◽  
Vol 34 (1) ◽  
pp. 1-8 ◽  
Author(s):  
M.-J. Gonzalez-Lopez ◽  
L. Gonzalez-Vega ◽  
C. Traverso ◽  
A. Zanoni

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