Contents Online

# Mathematical Research Letters

## Volume 25 (2018)

### Number 4

### Contents

Automorphisms of Salem degree $22$ on supersingular K3 surfaces of higher Artin invariant

pp. 1143-1150

Counting $G$-extensions by discriminant

pp. 1151-1172

Limit laws for random matrix products

pp. 1205-1212

Lyapunov exponents of the Hodge bundle over strata of quadratic differentials with large number of poles

pp. 1213-1225

On the existence of ghost classes in the cohomology of the Shimura variety associated to $GU(2, 2)$

pp. 1227-1249

Embedding arithmetic hyperbolic manifolds

pp. 1305-1328

Divisibilities among nodal curves

pp. 1359-1368