We give the full classification of irreducible projective threefolds whose k-secant variety has dimension smaller than the expected, for some k>1. As pointed out in the introduction, the case k=1 was already known before.
Chiantini, L., Ciliberto, C. (2005). The classification of defective threefolds. In Projective Varieties with Unexpected Properties (pp. 131-176). Berlin : Walter de Gruyter.
The classification of defective threefolds
CHIANTINI, LUCA;
2005-01-01
Abstract
We give the full classification of irreducible projective threefolds whose k-secant variety has dimension smaller than the expected, for some k>1. As pointed out in the introduction, the case k=1 was already known before.
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https://hdl.handle.net/11365/14654
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