Subvarieties of the Variety Generated by the Five-Element Brandt Semigroup
International Journal of Algebra and Computation
Brandt semigroups, Semigroup varieties
All subvarieties of the variety B2 generated by the five-element Brandt semigroup are characterized. Based on this characterization, an algorithm is provided that decides if a finite set of identities defines, within B2, a finitely generated subvariety.
Lee, Edmond W. H., "Subvarieties of the Variety Generated by the Five-Element Brandt Semigroup" (2006). Mathematics Faculty Articles. 145.