Bi-atomic classes of positive semirings Nicholas R. BaethScott T. ChapmanFelix Gotti RESEARCH ARTICLE 13 April 2021 Pages: 1 - 23
The Lawson number of a semitopological semilattice Taras BanakhSerhii BardylaOleg Gutik RESEARCH ARTICLE Open access 13 May 2021 Pages: 24 - 37
Analytic semigroups generated by Dirichlet-to-Neumann operators on manifolds Tim Binz RESEARCH ARTICLE Open access 18 May 2021 Pages: 38 - 61
Well-posedness and stability of nonautonomous past systems with unbounded operators in the delay term Samir BoujijaneSaid BouliteLahcen Maniar RESEARCH ARTICLE 04 June 2021 Pages: 62 - 86
Partial automorphisms and injective partial endomorphisms of a finite undirected path I. DimitrovaV. H. FernandesT. M. Quinteiro RESEARCH ARTICLE 18 May 2021 Pages: 87 - 105
Two weaker variants of congruence permutability for monoid varieties Sergey V. GusevBoris M. Vernikov RESEARCH ARTICLE 02 June 2021 Pages: 106 - 152
Solution to a problem of FitzGerald Jens HemelaerMorgan Rogers RESEARCH ARTICLE Open access 16 February 2021 Pages: 153 - 164
Partition regularity of polynomial systems near zero Lorenzo Luperi Baglini Research Article Open access 30 March 2021 Pages: 191 - 208
A note on Hardy’s theorem and rotations Partha Sarathi Patra RESEARCH ARTICLE 28 May 2021 Pages: 209 - 220
Dense numerical semigroups J. C. RosalesM. B. BrancoM. C. Faria RESEARCH ARTICLE 06 May 2021 Pages: 221 - 235
A formula for the conductor of a semimodule of a numerical semigroup with two generators Patricio AlmirónJulio José Moyano-Fernández SHORT NOTE 30 March 2021 Pages: 278 - 285
Amenability of semigroups and the Ore condition for semigroup rings V. S. Guba Short Note 09 March 2021 Pages: 286 - 290
A note on locally compact subsemigroups of compact groups Julio C. HernándezKarl H. Hofmann SHORT NOTE 11 February 2021 Pages: 291 - 294
Correction to: Numerical semigroups generated by primes Michael HellusAnton RechenauerRolf Waldi Correction 10 June 2021 Pages: 295 - 295