文件名称：关于SZ'aSZ的一个问题 (1988年)
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更新时间：2024-06-12 22:41:12
自然科学 论文
It is an open question;"In which ring are the distinct subrings always non-isomorphic?" (due to Szasz 1981). Definition A ring R is called an inner isomorphic,if the all,proper subrings are isomorphic of R. A ring R is called an inner non-isomorphic,if th