Abstract
For a 0-dimensional schemeX on a smooth quadricQ we define a special type of resolution of its ideal sheaf as a locally freeO Q. These resolutions allow to find, for schemes which are generic inQ, the minimal free resolution ofX as a subscheme of ℙ3. For almost all such schemes the graded Betti numbers in ℙ3 depend only on the Hilbert function ofX in ℙ3.
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Giuffrida, S., Maggioni, R., Ragusa, A., On the postulation of 0-dimensional subschemes on a smooth quadric. Pac. J. Math.155, 251–282 (1992).
Giuffrida, S., Maggioni, R., Ragusa, A., Resolutions of 0-dimensional subschemes of a smooth quadric. Proc. Int. Conf. Ravello (1992) de Gruyter, Berlin New York, 1994.
Hartshorne, R., Algebraic Geometry. GTM 52, Springer-Verlag, Berlin, 1977.
Idà, M., On the homogeneous ideal of the generic union of lines in ℙ3. J. reine angew. Math.403, 67–153 (1990).
Open Problems, Proc. Int. Conf. Ravello (1992) de Gruyter, Berlin New York, 1994.
Walter, C., Personal communication.
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Work done with financial support of M.U.R.S.T., while the authors were members of C.N.R.
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Giuffrida, S., Maggioni, R. & Ragusa, A. Resolutions of generic points lying on a smooth quadric. Manuscripta Math 91, 421–444 (1996). https://doi.org/10.1007/BF02567964
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DOI: https://doi.org/10.1007/BF02567964