%0 Journal Article %A Brezis, Haïm %A Gómez-Castro, David %T Rigidity of optimal bases for signal spaces %J Comptes Rendus. Mathématique %D 2017 %P 780-785 %V 355 %N 7 %I Elsevier %U http://www.numdam.org/articles/10.1016/j.crma.2017.06.004/ %R 10.1016/j.crma.2017.06.004 %G en %F CRMATH_2017__355_7_780_0