The notion of set-valued means is introduced. Set-valued counterparts of the arithmetic, quasi-arithmetic and Lagrangian means are investigated and various properties of them are presented.

中文翻译：

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集值均值

介绍了设定值均值的概念。研究了算术，拟算术和拉格朗日均值的集值对应物，并给出了它们的各种性质。