TY - JOUR TI - Ontario Mathematical Meetings JO - Canadian mathematical bulletin PY - 1970 SP - 410 EP - 414 VL - 13 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500031283/ DO - 10.1017/S0008439500031283 ID - 10_1017_S0008439500031283 ER -