pymiediff.special.psi

pymiediff.special.psi(n: Tensor, z: Tensor, **kwargs)

Riccati-Bessel function psi_n(z) and derivative.

Parameters:

• n (int or torch.Tensor) – Maximum order.

• z (torch.Tensor) – Complex argument(s).

Returns:

(psi_n, dpsi_n_dz) for orders 0..n.

Return type:

tuple of torch.Tensor