See the expanded details page.

Notes: Description is Šter's construction of the opposite ring of Bergman's original. It has been said that all examples of nonclean exchange rings so far are based on this one.

Keywords infinite matrix ring quotient ring subring

- D. Handelman. Perspectivity and cancellation in regular rings. (1977) @ Example 1
- J. Ster. Corner rings of a clean ring need not be clean. (2012) @ Example 3.1
- J. Ster. Lifting units in clean rings. (2013) @ Bergman's example
- K. R. Goodearl. Von Neumann regular rings. (1991) @ Example 4.26, pp 46-48
- T.-K. Lee, Z. Yi, and Y. Zhou. An example of Bergman's and the extension problem for clean rings. (2008) @ Bergman's example
- V. P. Camillo and H.-P. Yu. Exchange rings, units and idempotents. (1994) @ p 4746

Symmetric properties

Asymmetric properties

Legend

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

Name | Measure | |
---|---|---|

composition length | left: $\infty$ | right: $\infty$ |

weak global dimension | 0 |

Name | Description |
---|---|

Jacobson radical | $\{0\}$ |

Left singular ideal | $\{0\}$ |

Right singular ideal | $\{0\}$ |