This festschrift volume in honour of Donald B McAlister on the occasion of his 65th birthday presents papers from leading researchers in semigroups and formal languages. The contributors cover a number of areas of current interest: from pseudovarieties and regular languages to ordered groupoids and one-relator groups, and from semigroup algebras to presentations of monoids and transformation semigroups. The papers are accessible to graduate students as well as researchers seeking new directions for future work.
A Note on Finitely Generated Semigroups of Regular Languages (S Afonin & E Khazova); Complete Reducibility of Pseudovarieties (J Almeida et al.); Finite Generation of P-Semigroups with Almost G-Invariant Idempotents (C A Carvalho); Open Problems on Regular Languages: An Historical Perspective (L Chaubard & J-E Pin); Solving Systems of Equations Modulo Pseudovarieties of Abelian Groups and Hyperdecidability (M Delgado et al.); Finite Residue Class Rings of Integers Modulo N from the Viewpoint of Global Semigroup Theory (A Egri-Nagy & C L Nehaniv); A P-Theorem for Ordered Groupoids (N D Gilbert); On the Finite Basis Problem for the Monoids of Extensive Transformations (I A Goldberg); A Freiheitssatz for Subsemigroups of One-Relator Groups with Small Cancellation Condition (A Juhasz); Wreath Product Decompositions for Triangular Matrix Semigroups (M Kambites & B Steinberg); In McAlister's Footsteps: A Random Ramble Around the P-Theorem (M V Lawson & S W Margolis); On the Structure of the Lattice of Combinatorial Rees-Sushkevich Varieties (E W H Lee & M V Volkov); On Trivializers and Subsemigroups (A Malheiro); Semilattice Ordered Inverse Semigroups (D B McAlister); Isomorphism Problems for Transformation Semigroups (S Mendes-Goncalves); On McAlister's Monoid and Its Contracted Algebra (W D Munn); Relative Monoid Presentations and Finite Derivation Type (F Otto); Literal Varieties and Pseudovarieties of Homomorphisms onto Abelian Groups (L Polak); Factorizability in Certain Classes Over Inverse Semigroups (M B Szendrei).