Job title:

Professor Emeritus

Research area:

Bio:

**Selected Publications:**

- Rhodes, John and Steinberg, Benjamin (2009).
*The q-theory of finite semigroups.*Springer Monographs in Mathematics. Springer New York xxii+666. [MR] [GS?] - Rhodes, John and Silva, Pedro V. (2008).
*Turing machines and bimachines.*Theoret. Comput. Sci.**400**No.1-3, 182-224. [MR] [GS?] - Rhodes, John and Steinberg, Benjamin (2008).
*Closed subgroups of free profinite monoids are projective profinite groups.*Bull. Lond. Math. Soc.**40**No.3, 375-383. [MR] [GS?] - Rhodes, John and Steinberg, Benjamin (2006).
*Complexity pseudovarieties are not local; type II subsemigroups can fall arbitrarily in complexity.*Internat. J. Algebra Comput.**16**No.4, 739-748. [MR] [GS?] - Rhodes, John and Steinberg, Benjamin (2005).
*Krohn-Rhodes complexity pseudovarieties are not finitely based.*Theor. Inform. Appl.**39**No.1, 279-296. [MR] [GS?]

Research interests:

Algebra, Semigroups, Automata