在1930年，數學家Gottfried Maria Hugo Köthe提出了一個在環論上的問題，今天我們稱之為Koethe猜想。在本篇論文中，我們將探討數學家們在這個問題上所取得的進展。

In this paper we compile the results and problems related to the Koethe's problem in ring theory. Each section is devoted to an approach or a perspective toward the problem. Contents in distinct sections may be related, or independent.

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