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Duality and quadratic normality
Han, Frédéric
2015
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e-ISSN
2464-8728
Abstract
We consider congruences of multisecant lines to a non
linearly or non quadratically normal variety of codimension two or three
in a projective space. We give a uniform way to compute the degree of
the dual variety of their focal locus. Then we focus on the geometry
of the non quadratically normal variety of codimension three in Pg. In
particular we construct a component of the double locus of its dual from
the Hyper-Kahler 4-fold of Debarre-Voisin.
Series
Rendiconti dell’Istituto di Matematica dell’Università di Trieste. An International Journal of Mathematics
47 (2015)
Subjects
Publisher
EUT Edizioni Università di Trieste
Languages
en
File(s)