Graphmath.Vec3.p_norm

You're seeing just the function p_norm, go back to Graphmath.Vec3 module for more information.
Link to this function

p_norm(arg, order)

Specs

p_norm(vec3(), number()) :: number()

p_norm(v,order) returns the P-norm of vector v of order order.

order needs to be greater than or equal to 1 to define a metric space.

order 1 is equivalent to manhattan distance, 2 to Euclidean distance, otherwise all bets are off.