Secant spaces and Clifford's theorem
Marc Coppens, Gerriet Martens (1991)
Compositio Mathematica
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Marc Coppens, Gerriet Martens (1991)
Compositio Mathematica
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Robin Hartshorne (2002)
Collectanea Mathematica
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Gorenstein liaison seems to be the natural notion to generalize to higher codimension the well-known results about liaison of varieties of codimension 2 in projective space. In this paper we study points in P3 and curves in P4 in an attempt to see how far typical codimension 2 results will extend. While the results are satisfactory for small degree, we find in each case examples where we cannot decide the outcome. This examples are candidates for counterexamples to the hoped-for extensions...
Dan Abramovich, Joe Harris (1991)
Compositio Mathematica
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Fernando Cukierman, Douglas Ulmer (1993)
Compositio Mathematica
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Edoardo Ballico, N. Chiarli, S. Greco (2004)
Collectanea Mathematica
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We find some ranges for the 4-tuples of integers (d,g,n,r) for which there is a smooth connected non-degenerate curve of degree d and genus g, which is k-normal for every k ≤ r.
Alberto Dolcetti (1988)
Bulletin de la Société Mathématique de France
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Ferraro, R. (2003)
Advances in Geometry
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Mancini, Marina (2001)
Rendiconti del Seminario Matematico
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Edoardo Ballico (2002)
Collectanea Mathematica
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Let X be a smooth connected projective curve of genus g defined over R. Here we give bounds for the real gonality of X in terms of the complex gonality of X.