Circular centred operators
Given a unit circle C with centre o
We choose an arbitrary origin a0, and indicate the points ai by their curvilinear coordinates between 0 and 2p from a0.
Given two points a and a’, the value of the acute angle aoa? is indicated as a ? a’ = | a - a’ | if | a - a’ | ? p a ? a’ = 2p - | a - a’ | if | a - a’ | ? p