Volume 84, No. 1 (2009)
Commentarii Mathematici Helvetici
pp. 1–19 A product formula for valuations on manifolds with applications to the integral geometry of the quaternionic lineAndreas Bernig
pp. 21–56 Selmer groups and Tate–Shafarevich groups for the congruent number problemMaosheng XiongAlexandru Zaharescu
pp. 57–85 Kodaira dimension and symplectic sumsMichael Usher
pp. 87–126 A Caporaso–Harris type formula for Welschinger invariants of real toric Del Pezzo surfacesIlia ItenbergViatcheslav KharlamovEugenii Shustin
pp. 127–134 Transcendental submanifolds of projective spaceWojciech Kucharz
pp. 135–157 String topology for spheresLuc Menichi
pp. 159–169 for systolic groupsPiotr Przytycki
pp. 171–187 Group splittings and integrality of tracesIoannis Emmanouil
pp. 189–212 A lower bound on the essential dimension of a connected linear groupPhilippe GilleZinovy Reichstein
pp. 213–222 Zero-in-the-spectrum conjecture on regular covers of compact manifoldsPiotr W. Nowak