pai _PA5 cmavo

digit/number: pi (approximately 3.1416...); the constant defined by the ratio of the circumference to the diameter of all circles.

In notes:

ca'oi (exp!): binary operator: complex number from argument and phase, (r, \phi) \mapsto r e^{i \phi}
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.
tau'u (exp!): 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).