num::laplacian_stencil_2d_periodic

Defined in header <pde/stencil.hpp>

template <typename T>
void laplacian_stencil_2d_periodic(const vec<T> &x, vec<T> &y, int N);  // (1)

void laplacian_stencil_2d_periodic(const scalar_field_2d &x, scalar_field_2d &y);  // (2)

Periodic second-order 2D Laplacian stencil.