Karsten Henckell
Professor of Mathematics/Computational Science
M.A., Ph.D., University of California, Berkeley
B.A., University of Hamburg
Recent Courses
Calculus I* Section 1 and Section 2
Context-Free Languages and Turing Machines
Discrete Math*
Intro to Artificial Intelligence
Theory of Computation
Selected Publications
Accepted for Publication
K Henckell, J. Rhodes, and B. Steinberg. An effective lower bound for group complexity of finite semigroups and automata, accepted (May 2010) for Transactions of the American Mathematical Society
K. Henckell, J. Rhodes, and B. Steinberg. Aperiodic Pointlikes and beyond, in International Journal of Algebra and Computation , Vol. 20, issue 2(2010), pp. 287-305.
K. Henckell, J. Rhodes, and B. Steinberg. A Profinite approach to Stable Pairs, in International Journal of Algebra and Computation , Vol. 20, issue 2(2010), pp. 269-285.
K. Henckell. Stable Pairs, in International Journal of Algebra and Computation , Vol. 20, issue 2(2010), pp. 241-267.
K. Henckell. Idempotent Pointlike Sets, in International Journal of Algebra and Computation (2004), vol. 14, part 5/6, pp 703-718.
K. Henckell and J.E. Pin. Ordered Monoids and J - Trivial Monoids, in Algorithmic Problems in Groups and Semigroups (Birget et al, eds) (2000), pp 121-137.
K. Henckell. BG = PG, Revisited, in Algebraic Engineering (Nehaniv and Ito, eds) (1999), pp 416-426.
K. Henckell. Type-I Subsemigroups, Revisited, in Algebraic Engineering (Nehaniv and Ito, eds) (1999), pp 390-398.
K. Henckell. Product Expansions, in Journal of Pure and Applied Algebra, Vol. 101, pp 157-170 (1995).
B. Austin, K. Henckell, C. Nehaniv, J. Rhodes. Subsemigroups and Complexity via the Presentation Lemma, in Journal of Pure and Applied Algebra Vol. 101, No 3, pp 245-289 (1995).
K. Henckell. Type-I Subsemigroups, in Semigroups - Algebraic Theory and Applications to Formal Languages and Codes, Bonzini et al. Eds., World Scientific (1993).
K. Henckell, and J. Rhodes. Type-II Conjecture is True for J-Trivial Monoids, in Journal of Algebra, Vol 151, No. 1 (1992).
K. Henckell, S. W. Margolis, J.-E. Pin, and J. Rhodes. Ash's Type II Theorem, Profinite Topology and Malcev Products, Part I, in International Journal of Algebra and Computation, Vol. 1, No. 4 (1991).
K. Henckell. Block Groups = Power Groups, in Proceedings of the Monash Conference on Semigroups in Honor of G.B. Preston (1991).
K. Henckell and J. Rhodes. The Theorem of Knast, the PG = BG and Type-II Conjectures, in Proceedings of the Berkeley Workshop on Monoids (1991).
K. Henckell. The Type-II Conjecture: a Survey, in Proceedings of the Berkeley Workshop on Monoids (1991).
K. Henckell, and J. Rhodes. Reduction Theorem for the Type-II Conjecture for Finite Monoids, in Journal of Pure and Applied Algebra 66 (1990).
K. Henckell, J. Rhodes, and S. Lazarus. Prime Decomposition Theorem for Arbitrary Semigroups: general Holonomy Decomposition and Synthesis Theorem, in Journal of Pure and Applied Algebra 55 (1988), pp 127-172.
K. Henckell. Pointlike Sets: The Finest Aperiodic Cover of a Finite Semigroup, in Journal of Pure and Applied Algebra 55 (1988), pp 85-126.
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