pub fn setup_a_unreg<const NU: usize, const NV: usize>(
b_mat: &MatA<NV, NU>,
wv: &VecN<NV>,
) -> MatA<NV, NU>Expand description
Build the unregularised coefficient matrix A = Wv · G.
Returns an NV × NU matrix suitable for solve_cls with NC = NV.
No regularisation rows are appended, so this is appropriate when the
regularisation term γ ‖Wu (u − u_pref)‖² is not desired.