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比利时vs摩洛哥足彩 ,
university of california san diego

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math 208: algebraic geometry

lingyao xie

ucsd (l6xie@ucsd.edu)

extending numerical trivial divisors

abstract:

let $x$ be a normal variety with a projective contraction $f:x\to s$. assume $u$ is an open subset of $s$ and $l_u$ is a cartier divisor on $x_u:=x\times_s u$ such that $l_u$ is numerical trivial over $u$.

we will discuss about when it is possible and how to extend $l_u$ to a global cartier divisor $l$ on $x$ such that $l\equiv_f 0$.

october 25, 2024

4:00 pm

apm 7321

research areas

2022世界杯预选赛
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