Geodesic
Some Remarks on Regular and Strongly Regular Rings
Canadian mathematical bulletin, Tome 17 (1975) no. 5, pp. 709-712

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This article presents some new algebraic and module theoretic characterizations of strongly regular rings. The latter uses Lambek’s notion of symmetry. Strongly regular rings are shown to admit an involution and form an equational category. An example due to Paré shows that the category of regular rings and ring homomorphisms between them is not equational. Remarks on quasiinverses and the generalized inverse of a matrix are included. The author acknowledges support from the NRC (A7752) and improvements from W. Blair received after announcement of the results. 
Raphael, R. Some Remarks on Regular and Strongly Regular Rings. Canadian mathematical bulletin, Tome 17 (1975) no. 5, pp. 709-712. doi: 10.4153/CMB-1974-128-x
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     author = {Raphael, R.},
     title = {Some {Remarks} on {Regular} and {Strongly} {Regular} {Rings}},
     journal = {Canadian mathematical bulletin},
     pages = {709--712},
     year = {1975},
     volume = {17},
     number = {5},
     doi = {10.4153/CMB-1974-128-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-128-x/}
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