24 Superconvergency in the F EM 101
25 The adaptive solution refinement. h-, p-, and hp-refinement 106
25.1 hp-refinement . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
26 The boundary element method (BEM) 110
27 Indirect formulation of the BEM 110
27.1 The Neumann problem . . . . . . . . . . . . . . . . . . . . . . 111
27.2 The Dirichlet problem . . . . . . . . . . . . . . . . . . . . . . 112
28 The direct BEM 112
28.1 How to employ the BEM numerically . . . . . . . . . . . . . . 114
29 The spectral methods 117
30 Fast calculations in the spectral methods 121
129