Deformations of Arithmetically Cohen-Macaulay subvarieties of Pn
Mirò Roig RM
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We show that every arithmetically Cohen-Macaulay two-codimensional subscheme ofPn can be deformed to a reduced union of two-codimensional linear subvarieties. This problem (classical for curves with the name of Zeuthen problem) was solved for curves by F.Gaeta.