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- University of TrentoIT13 papers
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- Centre National de la Recherche ScientifiqueFR6 papers
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17 papers · 1 filter
Non-defectivity of Segre-Veronese varieties
Hirotachi Abo, Maria Chiara Brambilla, Francesco Galuppi +1
We prove that Segre-Veronese varieties are never secant defective if each degree is at least three. The proof is by induction on the number of factors, degree and dimension. As a c…
Minimal Terracini loci in the plane: gaps and non-gaps
Edoardo Ballico, Maria Chiara Brambilla
We study minimally Terracini finite sets of points in the projective plane and we prove that the sequence of the cardinalities of minimally Terracini sets can have any number of ga…
Minimal Terracini loci in projective spaces
Edoardo Ballico, Maria Chiara Brambilla
We characterize the number of points for which there exist non-empty Terracini sets of points in . Then we study minimally Terracini finite sets of points in $\mathbb…
Duality and polyhedrality of cones for Mori dream spaces
Maria Chiara Brambilla, Olivia Dumitrescu, Elisa Postinghel +1
Our goal is twofold. On one hand we show that the cones of divisors ample in codimension on a Mori dream space are rational polyhedral. On the other hand we study the duality b…
Surfaces in the flag threefold containing smooth conics and twistor fibers
Amedeo Altavilla, Edoardo Ballico, Maria Chiara Brambilla
We study smooth integral curves of bidegree , called \textit{smooth conics}, in the flag threefold . The study is motivated by the fact that the family of smooth…
Weyl cycles on the blow-up of at eight points
Maria Chiara Brambilla, Olivia Dumitrescu, Elisa Postinghel
We define the Weyl cycles on , the blown up projective space in points in general position. In particular, we focus on the Mori Dream spaces and $…