%0 Journal Article %T CJM volume 75 issue 1 Cover and Back matter %J Canadian journal of mathematics %D 2023 %P b1-b2 %V 75 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/S0008414X23000032/ %R 10.4153/S0008414X23000032 %F 10_4153_S0008414X23000032