Define the Fourier transform of a infinite kernel proposed in Schennach 2004
W_kernel_ft(xi, xi_lb = 0.5, xi_ub = 1.5)A numerical value or vector representing the Fourier transform of the infinite order kernel at the given frequency/frequencies.
A numerical value or vector representing the frequency domain.
The lower bound for the frequency domain. Defaults to 0.5.
The upper bound for the frequency domain. Defaults to 1.5.