%0 Journal Article %A Haim Brezis %A Petru Mironescu %T Non-local approximations of the gradient %J Confluentes Mathematici %D 2023 %P 27-44 %V 15 %I Institut Camille Jordan %U https://cml.centre-mersenne.org/articles/10.5802/cml.91/ %R 10.5802/cml.91 %G en %F CML_2023__15__27_0