Contact problem 1 Flow of fluids 1 Friction 1 Friction laws 1 Glacial geology 1 Grounding line 1 Ice sheet 1 Lagrange multipliers 1 Novel numerical methods Numerical approximations 1 Numerical methods 1 Steady state 1 Surface from 1 Time evolutions 1 Variational methods 1 Variational techniques 1 computational methods 1 ice sheets 1 variational methods 1