%0 Journal Article %A Braides, Andrea %A Vallocchia, Valerio %E Buttazzo, G. %E Casas, E. %E de Teresa, L. %E Glowinski, R. %E Leugering, G. %E Trélat, E. %E Zhang, X. %T Two geometric lemmas for $S^{N - 1}$-valued maps and an application to the homogenization of spin systems %J ESAIM: Control, Optimisation and Calculus of Variations %D 2021 %V 27 %I EDP-Sciences %U https://www.numdam.org/articles/10.1051/cocv/2021007/ %R 10.1051/cocv/2021007 %G en %F COCV_2021__27_1_A13_0