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Chisini mean : ウィキペディア英語版 | Chisini mean In mathematics, a function ''f'' of ''n'' variables :''x''1, ..., ''x''''n'' leads to a Chisini mean ''M'' if for every vector <x1 ... xn>, there exists a unique ''M'' such that :''f''(''M'',''M'', ..., ''M'') = ''f''(''x''1,''x''2, ..., ''x''''n''). The arithmetic, harmonic, geometric, generalised, Heronian and quadratic means are all Chisini means, as are their weighted variants. They were introduced by Oscar Chisini in 1929. ==References==
*Chisini, O. "Sul concetto di media." Periodico di Matematiche 4, 106–116, 1929.
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