`CoulombIntegrals.AsymptoticPoissonProblem`

— Method`AsymptoticPoissonProblem(R, k, u, v, R̃[; w′=similar(U)])`

Create the Poisson problem of order `k`

for the mutual density `u†(r) .* v(r)`

; the Poisson problem is solved numerically within the domain of `R̃`

and an asymptotic solution is used outside. For this to be valid, `u`

or `v`

have to vanish before the end of `R̃`

. `w′`

is a `MulQuasiVector`

of the same kind as `u`

and `v`

, and may optionally be provided as a pre-allocated vector, in case it is e.g. the diagonal of a potential matrix.

`CoulombIntegrals.PoissonProblem`

— Method`PoissonProblem(R, k[, ::Type{C}=eltype(R); poisson_cache])`

Create the Poisson problem of order `k`

for densities expanded over `R`

.

`CoulombIntegrals.get_double_laplacian`

— Method`get_double_laplacian(R, k)`

Return Laplacian (multiplied by `2`

) for partial wave `k`

of the basis `R`

, `-∂ᵣ² + k(k+1)/r²`

.