Near-order relation of power means
Abstract
On the setting of positive definite operators we study the near-order properties of power means such as the quasi-arithmetic mean (H\"older mean) and R\'enyi power mean. We see the monotonicity of spectral geometric mean and Wasserstein mean on parameters with respect to the near-order and the near-order relationship between the spectral geometric mean and Wasserstein mean. Furthermore, the monotonicity of quasi-arithmetic mean on parameters and the convergence of R\'enyi power mean to the log-Euclidean mean with respect to the near-order have been established.
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