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Thursday, July 30, 2015

What Holomorphic?

From the previous post "Clock Face And Life, Two Pies And Habits" dated 30 Jul 2015,

f(z)d(eiθ)=it.g(ωt)eiωtdω=it.G(t)

θ=ωt and z=Rθeiθ

Rθ being a function of θ.

f(z)d(eiθ)

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(eiθ) is valid.  In the case of simple periodicity, T a constant,

f(z)d(eiθ)=T0f(z)d(eiθ)=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 eiθ.