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SUMMARY:Chengxi Wang (UCLA)
DTSTART;VALUE=DATE-TIME:20221202T200000Z
DTEND;VALUE=DATE-TIME:20221202T210000Z
DTSTAMP;VALUE=DATE-TIME:20230208T063458Z
UID:agstanford/100
DESCRIPTION:Title: Calabi-Yau varieties of large index\nby Chengxi Wang (UCLA) as pa
rt of Stanford algebraic geometry seminar\n\n\nAbstract\nA projective vari
ety $X$ is called Calabi-Yau if its canonical divisor is $\\mathbb{Q}$-lin
early equivalent to zero. The smallest positive integer $m$ with $mK_X$ li
nearly equivalent to zero is called the index of $X$. Using ideas from mir
ror symmetry\, we construct Calabi-Yau varieties with index growing doubly
exponentially with dimension. We conjecture they are the largest index in
each dimension based on evidence in low dimensions. We also give Calabi-Y
au varieties with large orbifold Betti numbers or small minimal log discre
pancy. Joint work with Louis Esser and Burt Totaro.\n\nThe synchronous dis
cussion for Chengxi Wangâ€™s talk is taking place not in zoom-chat\, but a
t https://tinyurl.com/2022-12-02-cw (and will be deleted after ~3-7 days).
\n
LOCATION:https://researchseminars.org/talk/agstanford/100/
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