|b(m)|^2 of the Euler exponential spline along one mesh axis (paper eq 4.4).
1 / |b(m)|^2 = | sum_{k=0}^{p-2} M_p(k + 1) exp(2 pi i m k / K) |^2 for the
K frequencies m in FFT order. A vanishing denominator (odd orders
at the Nyquist frequency) is replaced by the mean of its neighbors, the
usual safeguard.
- Parameters:
size (int) – Mesh points K along the axis.
order (int) – Spline order p.
dtype (dtype) – Of the returned tensor.
device (device) – Of the returned tensor.
- Returns:
|b(m)|^2, shape (K,).
- Return type:
Tensor
