Contents
Relative Hofer-Zehnder capacity and periodic orbits in twisted cotangent bundles
VIKTOR L. GINZBURG and BA§ AK Z. GUREL 1
Infinitely generated Veech groups
PASCAL HUBERT and THOMAS A. SCHMIDT 49
The period-index problem for the Brauer group of an algebraic surface
A. J. DEJONG 71
Gaps in Jn mod 1 and ergodic theory
NOAM D. ELKIES and CURTIS T. MCMULLEN 95
On the Eisenstein cohomology of arithmetic groups
JIAN-SHU LI and JOACHIM SCHWERMER 141
A limit theorem for shifted Schur measures
CRAIG A. TRACY and HAROLD WIDOM 171
Family Gromov-Witten invariants for Kahler surfaces
JUNHO LEE 209