1. The word problem for one-relation monoids: a survey

   • Carl-Fredrik Nyberg-Brodda

   SURVEY Open access 10 August 2021 Pages: 297 - 355

   

2. Tied monoids

   • Diego Arcis
   • Jesús Juyumaya

   Research Article 20 July 2021 Pages: 356 - 394

   

3. HS-stability and complex products in involution semigroups

   • Bertalan Bodor
   • Erkko Lehtonen
   • Nikolaas Verhulst

   Research Article Open access 10 August 2021 Pages: 395 - 413

   

4. Incidence monoids: automorphisms and complexity

   • Mahir Bilen Can

   RESEARCH ARTICLE 08 June 2021 Pages: 414 - 438

   

5. The word problem for \(\kappa \)-terms over the pseudovariety of local groups

   • J. C. Costa
   • C. Nogueira
   • M. L. Teixeira

   Research Article 12 August 2021 Pages: 439 - 468

   

6. Levi-Civita functional equations and the status of spectral synthesis on semigroups

   • Bruce Ebanks
   • Che Tat Ng

   RESEARCH ARTICLE 16 July 2021 Pages: 469 - 494

7. Commutative monoid homology

   • Pierre Antoine Grillet

   Research Article 21 June 2021 Pages: 495 - 549

   

8. Canonical trace ideal and residue for numerical semigroup rings

   • Jürgen Herzog
   • Takayuki Hibi
   • Dumitru I. Stamate

   RESEARCH ARTICLE 28 June 2021 Pages: 550 - 566

9. Spectrum of partial automorphisms of regular rooted tree

   • Eugenia Kochubinska

   RESEARCH ARTICLE 06 August 2021 Pages: 567 - 574

10. A combinatorial approach to the structure of locally inverse semigroups

    • Luís Oliveira

    RESEARCH ARTICLE 16 July 2021 Pages: 575 - 621

    

11. Boundedness of partial difference transforms for heat semigroups generated by discrete Laplacian

    • Xinyu Ren
    • Chao Zhang

    RESEARCH ARTICLE 30 July 2021 Pages: 622 - 640

12. The ideal duplication

    • Danny Troia

    RESEARCH ARTICLE Open access 21 June 2021 Pages: 641 - 660

13. Semigroups and evolutionary equations

    • Sascha Trostorff

    RESEARCH ARTICLE Open access 27 July 2021 Pages: 661 - 699

14. New representations of algebraic domains and algebraic L-domains via closure systems

    • Mingyuan Wu
    • Lankun Guo
    • Qingguo Li

    RESEARCH ARTICLE 28 July 2021 Pages: 700 - 712

15. Correction to: A note on dual prehomomorphisms from a group into the Margolis–Meakin expansion of a group

    • Bernd Billhardt
    • Boorapa Singha
    • Jukrapong Tiammee

    Correction Open access 22 June 2021 Pages: 713 - 714