Description: Construct $R_{70}$ as Šter describes using a field $F$ of characteristic $2$. Let $T$ be the subrng of $\omega\times\omega$ matrices over $R_{70}$ which have only finitely many nonzero entries. The ring $R=T+F\subseteq M_\omega(R_{70})$ is Šter's ring.

Keywords infinite matrix ring subring

Reference(s):

- J. Ster. Corner rings of a clean ring need not be clean. (2012) @ Example 3.4

Symmetric properties

Asymmetric properties

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- = has the property
- = does not have the property
- = information not in database

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