On the classification of defective threefolds
Abstract
We classify all irreducible projective threefolds X which are k-defective, i.e. some k-secant variety of X has dimension less than the expected value. This results extends the classical Scorza's classification of the case k=1.
0
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.