TY - JOUR AU - Ern, Alexandre AU - Guermond, Jean-Luc TI - Finite element quasi-interpolation and best approximation JO - ESAIM: Mathematical Modelling and Numerical Analysis PY - 2017 SP - 1367 EP - 1385 VL - 51 IS - 4 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/m2an/2016066/ DO - 10.1051/m2an/2016066 LA - en ID - M2AN_2017__51_4_1367_0 ER -