FINITE ELEMENT EQUATIONS e Differential equation 0=Q+kVT o Interpolation among nodal unknowns (x,y)=N(x,y)7 Galerkin weighted residual N:(Q+kv2)a=尺≈0 Substituting, integrating by parts kiiT=gi where k= VNikVN:+乐 NinI dr anc gi=h NiQdv +fN.htadr