%0 Journal Article %A Tudorascu, Adrian %T On the convexity condition for the Semi-Geostrophic system %J ESAIM: Control, Optimisation and Calculus of Variations %D 2021 %V 27 %I EDP-Sciences %U https://www.numdam.org/articles/10.1051/cocv/2021018/ %R 10.1051/cocv/2021018 %G en %F COCV_2021__27_1_A27_0