Volume 95, No. 2 (2020)
Commentarii Mathematici Helvetici
pp. 211–246 Simple groups of birational transformations in dimension twoChristian Urech
pp. 247–278 Poisson brackets of partitions of unity on surfacesLev BuhovskyAlexander LogunovShira Tanny
pp. 279–299 Singular genuine rigidityLuis A. FloritFelippe Guimarães
pp. 301–337 Rational equivalence and Lagrangian tori on K3 surfacesNick SheridanIvan Smith
pp. 339–359 Algebraic varieties are homeomorphic to varieties defined over number fieldsAdam ParusińskiGuillaume Rond
pp. 361–420 Connected components of strata of Abelian differentials over Teichmüller spaceAaron Calderon