Now showing items 1-2 of 2

  • De Poi, Pietro (Research report / Forskningsrapport, 2001)
    In this article we classify all the smooth 3-folds of P5 with an apparent 4-tuple point provided that the family of its 4-secant lines is an irreducible (first order) congruence. This is sufficient to conclude the ...
  • Ranestad, Kristian; Mezzetti, Emilia; De Poi, Pietro; Faenzi, Daniele (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    We study congruences of lines Xω defined by a sufficiently general choice of an alternating 3-form ω in n dimensions, as Fano manifolds of index 3 and dimension n-1. These congruences include the G2-variety for n=6 and the ...