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The good regulator is a theorem conceived by Roger C. Conant and W. Ross Ashby that is central to cybernetics. It is stated that "every good regulator of a system must be a model of that system". Any regulator that is maximally successful and simple must be isomorphic with the system being regulated. This makes a model necessary. With regard to the brain, insofar as it is successful and efficient as a regulator for survival, it must proceed, in learning, by the formation of a model (or models) of its environment.〔Conant and Ashby, ''Int. J. Systems Sci.'', 1970, vol 1, No 2, pp. 89–97〕 The theorem is general enough to apply to all regulating and self-regulating or homeostatic systems. The theorem does not explain what it takes for the system to become a good regulator. The problem of creation of good regulators is addressed by (practopoietic ) theory. == See also == * Analogy#Mathematics * Variety (cybernetics) * Practopoiesis 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Good regulator」の詳細全文を読む スポンサード リンク
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