vanishing line是什么意思

用法例句

If there is a holomorphic surjective map from X onto Y,there exist curves in X biholomorphic to the complex projective line.

如果存在n维复流形X到n维代数流形的非同构的全纯满射(n≥2),那么X中存在与复射影直线全纯同构的曲线。