Includes bibliographical references.

On the mathematical work of Robert Brooks ; Moduli spaces of homotopy theory ; egular graphs and Hecke surfaces ; Isospectrality and spectral rigidity of surfaces with small topology ; Topics in isoperimetric inequalities ; Hidden symmetries and arithmetic manifolds ; Variants of the N+1 conjecture and multiplicative semigroups ; Energy capacity inequalities via an action selector ; On nonbounded generation of discrete subgroups in rank1 Lie group ; Isospectral and isoscattering manifolds: a survey of techniques and examples ; Filling area conjecture, optimal systolic inequalities, and the fiber class in abelian covers ; An invitation to Deninger's work on arithmetic zeta functions ; Some more nonarithmetic rigid groups ; On domain monotonicity for the principal eigenvalue of the Laplacian with a mixed DirichletNeumann boundary condition ; The sharp form of the strong Szego theorem Peter Buser ; David Blanc ; R Brooks and M Monastyrsky ; Peter Buser and KlausDieter Semmler ; Isaac Chavel ; Benson Farb and Shmuel Weinberger ; Hershel M Farkas ; Urs Frauenfelder Viktor Ginzburg and Felix Schlenk ; Koji Fujiwara ; Carolyn Gordon Peter Perry and Dorothee Schueth ; Mikhail G Katz and Christine Lescop ; Eric Leichtnam ; Alexander Lubotzky ; Ross G Pinsky ; Barry Simon