3 papers
math.AG2026
Geometric singularities of regular surfaces with nef anti-canonical divisors over imperfect fields
Chongning Wang, Lei Zhang
Let be a regular projective surface over a field of characteristic , with and nef. We prove that is geometrically integral over …
math.AG2024
Irregular threefolds with numerically trivial canonical divisor
Jingshan Chen, Chongning Wang, Lei Zhang
In this paper, we classify irregular threefolds with numerically trivial canonical divisors in positive characteristic. For such a variety, if its Albanese dimension is not maximal…
math.AG2023
On canonical bundle formula for fibrations of curves with arithmetic genus one
Jingshan Chen, Chongning Wang, Lei Zhang
In this paper, we develop canonical bundle formulas for fibrations of relative dimension one in characteristic . For such a fibration from a log pair , i…