%0 Journal Article %A Liu, Yongxiang %A Xu, Xuejun %T An optimized Schwarz method with relaxation for the Helmholtz equation: the negative impact of overlap %J ESAIM: Mathematical Modelling and Numerical Analysis %D 2019 %P 249-268 %V 53 %N 1 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/m2an/2018061/ %R 10.1051/m2an/2018061 %G en %F M2AN_2019__53_1_249_0