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Thursday, July 30, 2015

Clock Face And Life, Two Pies And Habits

Instead of,

df(z)dz  or  f(z)dz

we do,

df(z)d(eiθ)  or  f(z)d(eiθ)

or equivalently,

df(z)d(ˆz)  or  f(z)d(ˆz)

where ˆz denote the unit vector opposite to the z direction.

This way dˆz or d(eiθ) is opposite to the direction of z; at an angle θ to the x axis on the ix plane.  Furthermore,

f(z)d(eiθ)=if(z)eiθdθ

and

df(z)deiθ=1ieiθdf(z)dθ

In the famous counter example to holomorphic function, f(z)=ˉz

1ieiθdˉzdθ=1ieiθ{Rdeiθdθ+eiθdRdθ}=1ieiθ{Reiθ.(i)+eiθdRdθ}=R+idRdθ

this result is independent of θ when R is a constant (a circle) or has a linear dependence on θ (ie dRdθ=constant, a linear spiral).

Furthermore,

f(z)d(eiθ)=f(z)eiθeiθdf(z)=if(z)eiθdθ

when we have,

θ=ωt   and  z=R(ωt)eiωt

f(z)=g(ωt)

f(z)d(eiθ)=ig(ωt)eiθdθ=ig(ωt)eiωt.tdω

In fact,

f(z)d(eiθ)=itg(ωt)eiωtdω=it.G(t)

we have Fourier Transform on the RHS of the expression,

it.G(t)

t being independent of ω, G(t) is the Fourier transform of g(ωt) or f(z) with parameter t, and the i factor returns us to the positive θ=0 direction.

On the LHS, we have f(z) integrated around a unit circle eiθ, for all values of θ from to .

As we go around in circles with f(z), we travel linearly through time t by G(t).

f(z) should be called the clock function, and G(t) our life function.

g(ωt) is our habits, the sum of which in all magnitudes of frequencies is our life, G(t).  g(ωt) is the habit function.

Note:  After the correction eiθeiθ, life is no longer negative.