The term mean is usually used to imply averaging behavior. Quasi-arithmetic means
defined with respect to a weighting vector with all w j = 1 are symmetric, and asymmetric otherwise. Usually the weight allocated to a particular input is indicative of
the importance of that particular input. All power means (including WAMw, Gw and
Hw) are idempotent, homogeneous and strictly monotone on the open interval ]0, 1[n,
however only the weighted arithmetic mean is shift-invariant. The geometric mean
is not Lipschitz continuous5.