TY - JOUR TI - BCM volume 62 Issue 1 Cover and Back matter JO - Canadian mathematical bulletin PY - 2019 SP - b1 EP - b2 VL - 62 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4153/S0008439518000711/ DO - 10.4153/S0008439518000711 ID - 10_4153_S0008439518000711 ER -