TY - JOUR TI - Solution JO - Canadian mathematical bulletin PY - 1966 SP - 116 EP - 116 VL - 9 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500027405/ DO - 10.1017/S0008439500027405 ID - 10_1017_S0008439500027405 ER -