Anything which repeats itself is amenable to Fourier Analysis.

If there's a once-only event then Heaviside's Operational Calculus is
appropriate.

It's not more difficult. It's just a matter of getting used to it.

=================================

"Richard Harrison" wrote -
Cecil, W5DXP wrote:
"You don`t really think that our present Big Bang was the first one
ever, do you?"