TY - JOUR AU - Rannacher, R. AU - Wendland, W. L. TI - On the order of pointwise convergence of some boundary element methods. Part I. Operators of negative and zero order JO - ESAIM: Modélisation mathématique et analyse numérique PY - 1985 SP - 65 EP - 87 VL - 19 IS - 1 PB - AFCET - Gauthier-Villars PP - Paris UR - http://www.numdam.org/item/M2AN_1985__19_1_65_0/ LA - en ID - M2AN_1985__19_1_65_0 ER -