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 Linear subspaces, symbolic powers and Nagata type conjectures


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Prompted by results of Guardo, Van Tuyl and the second author for lines in projective 3 space, we develop asymptotic upper bounds for the least degree of a homogeneous form vanishing to order at least m on a union of disjoint r dimensional planes in projective n space for n at least 2r+1. These considerations lead to new conjectures that suggest that the well known conjecture of Nagata for points in the projective plane is not sporadic, but rather a special case of a more general phenomenon.



Author: Marcin Dumnicki; Brian Harbourne; Tomasz Szemberg; Halszka Tutaj-Gasińska

Source: https://archive.org/







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