%0 Journal Article %T GMJ volume 62 issue S1 Cover and Front matter %J Glasgow mathematical journal %D 2020 %P f1-f2 %V 62 %N S1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089520000488/ %R 10.1017/S0017089520000488 %F 10_1017_S0017089520000488