Contents Online

# Mathematical Research Letters

## Volume 18 (2011)

### Number 1

### Contents

New Parts of Hecke Rings

pp. 59-73

The $p$-adic Lefschetz $(1,1)$ theorem in the semistable case, and the Picard number jumping locus

pp. 107-124

A short proof to the rigidity of volume entropy

pp. 151-153

The Distribution of Values of Short Hybrid Exponential Sums on Curves over Finite Fields

pp. 155-174