On two mean value properties and functional equations associated with them.
Aequationes mathematicae, Tome 38 (1989) no. 1, pp. 216-235.

Voir la notice de l'article provenant de la source European Digital Mathematics Library

Mots-clés : arithmetic mean, geometric mean, general solutions, harmonic mean, commutative fields, quasiarithmetic mean, mean value theorem
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     author = {J\'anos Acz\'el and Marek Kuczma},
     title = {On two mean value properties and functional equations associated with them.},
     journal = {Aequationes mathematicae},
     pages = {216--235},
     publisher = {mathdoc},
     volume = {38},
     number = {1},
     year = {1989},
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János Aczél; Marek Kuczma. On two mean value properties and functional equations associated with them.. Aequationes mathematicae, Tome 38 (1989) no. 1, pp. 216-235. http://geodesic.mathdoc.fr/item/AM2_1989__38_1_137329/