Author/Authors :
Stephan Dahlke، نويسنده , , Erich Novak ، نويسنده , , Winfried Sickel، نويسنده ,
Keywords :
Elliptic operator equations , Linear and nonlinear approximation methods , Besov spaces , Best n-termapproximation , Worst case error , Manifold widths , Gelfand widths , Bernstein widths
