Figure 3From: The stable extrinsic extended finite element method for second order elliptic equation with interfaces The mesh and interface and intersection nodes and area: left, \(\pmb{r=0.1}\) , \(\pmb{h=2/11}\) , middle \(\pmb{r=0.1}\) , \(\pmb{h=2/19}\) and right \(\pmb{r=0.3}\) , \(\pmb{h=2/19}\) . Back to article page