See HersteinArchived 2020-05-07 at the वेबैक मशीन 1964, page 1: "An algebraic system can be described as a set of objects together with some operations for combining them".
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See HersteinArchived 2020-05-07 at the वेबैक मशीन 1964, page 1: "An algebraic system can be described as a set of objects together with some operations for combining them".