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UID:news2120@dmi.unibas.ch
DTSTAMP;TZID=Europe/Zurich:20261106T115415
DTSTART;TZID=Europe/Zurich:20261110T103000
SUMMARY:Seminar Algebra and Geometry: Pietro Beri (Université de Lorraine/
 Goethe Universität Frankfurt)
DESCRIPTION:Given a variety embedded in projective space\, its secant varie
 ty is the closure of the union of all lines secant to it. We explore the r
 ole that secant varieties can play in the construction of projective model
 s of hyper-Kähler manifolds.\\r\\nIn joint work with Agostini\, Giovenzan
 a and Ríos-Ortiz\, we describe the singular locus of secant varieties\, u
 sing recent results of Choi\, Lacini\, Park and Sheridan that generalize t
 he classical Terracini's lemma. Our description provides a tool for constr
 ucting projective models and leads to further examples\, while also reveal
 ing geometric features of independent interest.
X-ALT-DESC:<p>Given a variety embedded in projective space\, its secant var
 iety is the closure of the union of all lines secant to it. We explore the
  role that secant varieties can play in the construction of projective mod
 els of hyper-Kähler manifolds.</p>\n<p>In joint work with Agostini\, Giov
 enzana and Ríos-Ortiz\, we describe the singular locus of secant varietie
 s\, using recent results of Choi\, Lacini\, Park and Sheridan that general
 ize the classical Terracini's lemma. Our description provides a tool for c
 onstructing projective models and leads to further examples\, while also r
 evealing geometric features of independent interest.</p>
DTEND;TZID=Europe/Zurich:20261110T120000
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