A-stability 4 Cross-grid 4 Finite Element 4 Finite element method 4 Macro element 4 Macroelement technique 4 Mixed finite element methods 4 Mixed finite elements 4 Numerical methods 4 Numerical results 4 Numerical solution 4 Pressure modes 4 Stability 4 Stability analysis 4 Stokes problem 4 Triangular meshes 4 Two space dimensions 4