Contents Online

# Mathematical Research Letters

## Volume 15 (2008)

### Number 2

### Contents

A family of covering properties

pp. 221-238

Curves on algebraic models of smooth manifolds

pp. 289-295

Totally geodesic subgraphs of the pants complex

pp. 309-320

A characterization of Gorenstein Hilbert functions in codimension four with small initial degree

pp. 331-349

Sum-product estimates via directed expanders

pp. 375-388