REFERENCES
- Borooah , G. , Diesl , A. J. , Dorsey , T. J. ( 2007 ). Strongly clean triangular matrix rings over local rings . J. Algebra 312 : 773 – 797 .
- Borooah , G. , Diesl , A. J. , Dorsey , T. J. ( 2008 ). Strongly clean matrix rings over commutative local rings . J. Pure Appl. Algebra 212 : 281 – 296 .
- Chen , J. , Yang , X. , Zhou , Y. ( 2006 ). When is the 2 × 2 matrix ring over a commutative local ring strongly clean? J. Algebra 301 : 280 – 293 .
- Chen , J. , Yang , X. , Zhou , Y. ( 2006 ). On strongly clean matrix and triangular matrix rings . Comm. Algebra 34 : 3659 – 3674 .
- Cui , J. , Chen , J. ( 2011 ). When is a 2 × 2 matrix ring over a commutative local ring quasipolar? Comm. Algebra 39 : 3212 – 3221 .
- Harte , R. E. ( 1991 ). On quasinilpotents in rings . Panam. Math. J. 1 : 10 – 16 .
- Koliha , J. J. , Patricio , P. ( 2002 ). Elements of rings with equal spectral idempotents . J. Austral. Math. Soc. 72 : 137 – 152 .
- Li , Y. ( 2007 ). Strongly clean matrix rings over local rings . J. Algebra 312 : 397 – 404 .
- Nicholson , W. K. ( 1999 ). Strongly clean rings and Fitting's lemma . Comm. Algebra 27 : 3583 – 3592 .
- Wang , Z. , Chen , J. ( 2004 ). On two open problems about strongly clean rings . Bull. Austral. Math. Soc. 70 : 279 – 282 .
- Yang , X. , Zhou , Y. ( 2008 ). Strong cleanness of the 2 × 2 matrix ring over a general local ring . J. Algebra 320 : 2280 – 2290 .
- Ying , Z. , Chen , J. ( 2009 ). On quasipolar rings. Algebra Colloq., in press .
- Communicated by S. Sehgal.