%0 Journal Article %A Cushman, Richard %A Śniatycki, Jędrzej %T On Subcartesian Spaces Leibniz’ Rule Implies the Chain Rule %J Canadian mathematical bulletin %D 2020 %P 348-357 %V 63 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/S0008439519000407/ %R 10.4153/S0008439519000407 %F 10_4153_S0008439519000407