TY - JOUR AU - Haim Brezis AU - Petru Mironescu TI - Non-local approximations of the gradient JO - Confluentes Mathematici PY - 2023 SP - 27 EP - 44 VL - 15 PB - Institut Camille Jordan UR - https://cml.centre-mersenne.org/articles/10.5802/cml.91/ DO - 10.5802/cml.91 LA - en ID - CML_2023__15__27_0 ER -