Volume 67, No. 3/4 (2021)
L’Enseignement Mathématique

pp. 229–299 The Harish-Chandra integral: An introduction with examplesColin McSwiggen
pp. 301–330 Relative geometric invariant theoryAlexander H.W. Schmitt
pp. 331–367 Equivariant discretizations of diffusions, random walks, and harmonic functionsWerner BallmannPanagiotis Polymerakis
pp. 369–401 Lattice equable quadrilaterals I: ParallelogramsChristian AebiGrant Cairns
pp. 403–422 Transformées de Fourier des fonctions d’invariance hyperbolique surLaurent Clozel
pp. 423–454 On the integration of transitive Lie algebroidsEckhard Meinrenken
pp. 455–462 Commission Internationale de l’Enseignement Mathématique. Once upon a time ... Historical vignettes from the Archives of ICMI: The origins of the ICMEsBernard R. Hodgson