2 papers
math.AG2019
Fractional Dehn twists and modular invariants
Xiao-Lei Liu
In this note, we establish a relationship between fractional Dehn twist coefficients of Riemann surface automorphisms and modular invariants of holomorphic families of algebraic cu…
math.AG2016
Modular invariants and singularity indices of hyperelliptic fibrations
Xiao-Lei Liu
The modular invariants of a family of semistable curves are the degrees of the corresponding divisors on the image of the moduli map. The singularity indices were introduced by G.…