1. Finiteness spaces, étale groupoids and their convolution algebras

   • Joey Beauvais-Feisthauer
   • Richard Blute
   • Pierre-Alain Jacqmin

   Research Article 12 March 2020 Pages: 243 - 258

2. Set-theoretical solutions of the Yang–Baxter and pentagon equations on semigroups

   • Francesco Catino
   • Marzia Mazzotta
   • Paola Stefanelli

   Research Article 21 April 2020 Pages: 259 - 284

3. Near-ring congruences on additively regular seminearrings

   • Kamalika Chakraborty
   • Pavel Pal
   • Sujit Kumar Sardar

   Research Article 05 August 2020 Pages: 285 - 302

4. A generalization of Wilf’s conjecture for generalized numerical semigroups

   • Carmelo Cisto
   • Michael DiPasquale
   • Rosanna Utano

   Research Article 21 January 2020 Pages: 303 - 325

   

5. On finitary properties for fiber products of free semigroups and free monoids

   • Ashley Clayton

   RESEARCH ARTICLE Open access 14 August 2020 Pages: 326 - 357

   

6. Approximate semi-amenability of Banach algebras

   • F. Ghahramani
   • R. J. Loy

   Research Article 06 March 2020 Pages: 358 - 384

7. Some results on \(\mathcal {L}\)-commutative semigroups

   • Roman S. Gigoń

   Research Article Open access 19 March 2020 Pages: 385 - 399

8. Abundance of progressions in a commutative semigroup by elementary means

   • Sayan Goswami
   • Subhajit Jana

   Research Article 24 September 2019 Pages: 400 - 405

9. Simple semirings with a bi-absorbing element

   • Tomáš Kepka
   • Miroslav Korbelář
   • Petr Němec

   Research Article 13 May 2020 Pages: 406 - 420

   

10. Commutative monoids and their corresponding affine \(\Bbbk \)-schemes

    • Alberto Navarro
    • José Navarro
    • Ignacio Ojeda

    Research Article 19 November 2019 Pages: 421 - 434

11. On the Ellis semigroup of a cascade on a compact metric countable space

    • Andres Quintero
    • Carlos Uzcátegui

    Research Article 27 February 2020 Pages: 435 - 451

12. Multi-sensitivity with respect to a vector for semiflows

    • Rahul Thakur
    • Ruchi Das

    Research Article 31 August 2020 Pages: 452 - 464

13. On the spectra of commutative semigroups

    • Huanrong Wu
    • Qingguo Li

    Research Article 27 July 2020 Pages: 465 - 485

    

14. On nilpotent subsemigroups of the order-preserving and decreasing transformation semigroups

    • Melek Yağcı
    • Emrah Korkmaz

    Research Article 23 March 2020 Pages: 486 - 496

15. The Bohr compactification of an abelian group as a quotient of its Stone–Čech compactification

    • Pavol Zlatoš

    Research Article 29 July 2020 Pages: 497 - 506