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BEGIN:VEVENT
UID:news2007@dmi.unibas.ch
DTSTAMP;TZID=Europe/Zurich:20260421T131218
DTSTART;TZID=Europe/Zurich:20260512T103000
SUMMARY:Seminar Algebra and Geometry: Saverio Secci (SISSA)
DESCRIPTION:A famous theorem of Shokurov states that a general anticanonica
 l divisor of a smooth Fano threefold is a smooth K3 surface. In a joint wo
 rk with Andreas Höring we proved that for four-dimensional Fano manifolds
  the behaviour is completely opposite: if the anticanonical base locus is 
 a normal surface\, all the anticanonical divisors are singular.\\r\\nIn th
 is talk I will present our follow-up result\, namely the classification of
  smooth Fano fourfolds with scheme-theoretic base locus a smooth surface: 
 they form 22 families. I will also mention a result on elliptic Calabi-Yau
  threefolds that we obtained as a technical step in our study.
X-ALT-DESC:<p>A famous theorem of Shokurov states that a general anticanoni
 cal divisor of a smooth Fano threefold is a smooth K3 surface. In a joint 
 work with Andreas Höring we proved that for four-dimensional Fano manifol
 ds the behaviour is completely opposite: if the anticanonical base locus i
 s a normal surface\, all the anticanonical divisors are singular.</p>\n<p>
 In this talk I will present our follow-up result\, namely the classificati
 on of smooth Fano fourfolds with scheme-theoretic base locus a smooth surf
 ace: they form 22 families. I will also mention a result on elliptic Calab
 i-Yau threefolds that we obtained as a technical step in our study.</p>
DTEND;TZID=Europe/Zurich:20260512T120000
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