void poisson_regular(int k_div, int nzet, double unsgam1, Param &par, Scalar &uu, Scalar &uu_regu, Scalar &uu_div, Tensor &duu_div, Scalar &source_regu, Scalar &source_div) const
Solves the scalar Poisson equation with *this as a source (version with parameters to control the res...