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UID:news1858@dmi.unibas.ch
DTSTAMP;TZID=Europe/Zurich:20250525T181523
DTSTART;TZID=Europe/Zurich:20250528T160000
SUMMARY:Seminar Algebra and Geometry: Fernando Figueroa (Northwestern Unive
 rsity)
DESCRIPTION:Log Calabi-Yau Pairs are a generalization of Calabi-Yau varieti
 es\, naturally occurring when considering families or branched covers. The
  Complexity of a Calabi-Yau pair measures how far it is from being a toric
  pair. More concretely\,  Brown\, McKernan\, Svaldi and Zong proved that 
 any Calabi-Yau pair of index one and complexity 0 is a toric pair. Recent 
 work of Mauri and Moraga has studied its crepant birational analogue\, the
  "birational complexity"\, which measures how far the pair is from admitti
 ng a birational toric model. In this talk we will extend some of the previ
 ously known results for Calabi-Yau pairs of index one to arbitrary index. 
 In particular we completely characterize Calabi-Yau pairs of complexity ze
 ro and arbitrary index. This is based on joint work with Joshua Enwright.
X-ALT-DESC:<p>Log Calabi-Yau Pairs are a generalization of Calabi-Yau varie
 ties\, naturally occurring when considering families or branched covers.<b
 r /> The Complexity of a Calabi-Yau pair measures how far it is from being
  a toric pair. More concretely\,&nbsp\; Brown\, McKernan\, Svaldi and Zong
  proved that any Calabi-Yau pair of index one and complexity 0 is a toric 
 pair.<br /> Recent work of Mauri and Moraga has studied its crepant birati
 onal analogue\, the "birational complexity"\, which measures how far the p
 air is from admitting a birational toric model.<br /> In this talk we will
  extend some of the previously known results for Calabi-Yau pairs of index
  one to arbitrary index. In particular we completely characterize Calabi-Y
 au pairs of complexity zero and arbitrary index.<br /> This is based on jo
 int work with Joshua&nbsp\;Enwright.</p>
DTEND;TZID=Europe/Zurich:20250528T173000
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