%0 Journal Article %T GMJ volume 63 issue 2 Cover and Back matter %J Glasgow mathematical journal %D 2021 %P b1-b3 %V 63 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089521000094/ %R 10.1017/S0017089521000094 %F 10_1017_S0017089521000094