tau'u PA5 experimental cmavo

digit/number: tau (denoted "τ": approximately 6.2831...). The constant defined by the ratio of the circumference to the radius of all circles (default: in Euclidean geometry).

Defaults to Euclidean geometric case (with the 2-norm). Context or explicit specification of overriding this default or of a different geometry can alter its value. See also: "pai", "pai'i". Proposed (experimental) 2 in language x3.">cmarafsi: "-tux-".

In notes:

ka'o'ei (exp!)
imaginary i, comma - spherical coordinates: first coordinate gives magnitude (complex modulus/radius) of the number, the second number gives the angle from the positive real axis measured counterclockwise toward the 'positive' imaginary axis (default: in the primary branch/Arg) as measured in some units (which that number should contain; the contextless default will suppose radians); the angle is not normalized.
pai'i (exp!)
Digit/number: pi (denoted "π"; approximately 3.1416...); the constant defined by the ratio of the circumference to the diameter of all circles in Euclidean space.
pi'au (exp!)
digit/number: pi (approximately 3.1416...); the constant defined by the ratio of the circumference to the diameter of all circles.