hp finite element and boundary element methods for elliptic elliptic stochastic parabolic and hyperbolic obstacle and contact problems Stochastic time dependent contact obstacle problems mixed and VI hp FEM BEM a priori and a posteriori error estimates and hp adaptivity semi smooth Newton biorthogonal basis functions. Stochastische zeitabhängige Kontakt Hindernis Probleme gemischte und VU hp FEM BEM a priori und a posteriori Fehlerabschätzungen halbglattes Newton biorthogonale Basisfunktionen