From the previous post "Clock Face And Life, Two Pies And Habits" dated 30 Jul 2015,
∫∞−∞f(z)d(e−iθ)=−∫∞−∞it.g(ωt)e−iωtdω=−it.G(t)
θ=ωt and z=Rθeiθ
Rθ being a function of θ.
∫f(z)d(e−iθ)
takes a free ride with Fourier. Must it still be holomorphic?
f(z)=g(ωt)
as long as the Fourier tansform of g(ωt) exist, ∫∞−∞f(z)d(e−iθ) is valid. In the case of simple periodicity, T a constant,
∫∞−∞f(z)d(e−iθ)=∫T0f(z)d(e−iθ)=−it.G(t)|T0=−i.TG(T)
where G(t) is the Fourier transform of f(z) with z replaced by ω. −i is in the direction of θ=0.
Most liberating.
Note: −i.tG(t) is a complex function (θ=ωt being real), with a dual f(z), running around in circles in the complex plane.
eiθ being replaced with e−iθ.