Before revision: In 12 , the authors introduce an adaptive, stabilized finite element method (FEM), which solves a stable saddle-point problem . The method delivers a stable continuous approximation and projects the residual onto a broken polynomial space .
After revision: In 12 , the authors introduce an adaptive, stabilized finite element method (FEM), which solves a stable saddle-point problem , this residual minimization delivers a stable continuous approximation and projects the residual onto a broken polynomial space .