1. Semigroups and Toposes

   • J. Funk

   OriginalPaper Pages: 480 - 519

2. Some Decidability and Undecidability Results on Green's Relations for Automatic Monoids

   • Friedrich Otto

   OriginalPaper Pages: 520 - 535

3. When all S-Posets Are Principally Weakly Flat

   • Husheng Qiao
   • Fang Li

   OriginalPaper Pages: 536 - 542

4. Monoids and Cuspidal Group Characters

   • Mohan S. Putcha

   OriginalPaper Pages: 543 - 553

5. Lower-Modular Elements of the Lattice of Semigroup Varieties

   • B.M. Vernikov

   OriginalPaper Pages: 554 - 566

6. On the Arithmetic of Strongly Primary Monoids

   • Alfred Geroldinger
   • Wolfgang Hassler
   • Gunter Lettl

   OriginalPaper Pages: 567 - 587

7. Congruence-Simple Semirings

   • Robert El Bashir
   • Tomas Kepka

   OriginalPaper Pages: 588 - 608

8. A Semigroup Approach to Queueing Systems

   • Abdukerim Haji
   • Agnes Radl

   OriginalPaper Pages: 609 - 623

9. Opial Type Inequalities for Semigroups

   • George A. Anastassiou

   OriginalPaper Pages: 624 - 633

10. On Unitary Extensions of Multiplicative Families of Partial Isometries with a Generating Subspace

    • Ramon Bruzual
    • Marisela Dominguez

    OriginalPaper Pages: 634 - 647

11. Generating Self-Map Monoids of Infinite Sets

    • Zachary Mesyan

    OriginalPaper Pages: 648 - 675

12. Representation of Numerical Semigroups by Dyck Paths

    • Maria Bras-Amoros
    • Anna de Mier

    OriginalPaper Pages: 676 - 681

13. Universal Objects in Some Classes of Clifford Topological Inverse Semigroups

    • Olena Hryniv

    OriginalPaper Pages: 682 - 688