Riemannian Center of Mass and so called karcher mean

Understand

The Riemannian center of mass was constructed in [GrKa] (1973).

• In [GKR1, GKR2, Gr, Ka, BuKa] (1974-1981) it was successfully applied with more refined estimates.
• Probably in 1990 someone renamed it without justification into karcher mean and references to the older papers were omitted by those using the new name.
• As a consequence newcomers started to reprove results from the above papers.