On a pull-back diagram for orthodox semigroups Mária B. Szendrei Research Article 01 December 1980 Pages: 1 - 10
Varietes de langages et monoide des parties Jean-Eric Pin Research Article 01 December 1980 Pages: 11 - 47
Topological semilattices with enough closed subsemilattices to separate points James W. Stepp Research Article 01 December 1980 Pages: 49 - 54
A general purity law for convolution semigroups with discrete Lévy measure Arnold Janssen Research Article 01 December 1980 Pages: 55 - 71
On the quasivaieties generated by finite semigroups M. V. Sapir Research Article 01 December 1980 Pages: 73 - 88
Another semigroup characterization of the simple closed curve K. D. Magill Jr.S. Subbiah Short Note 01 December 1980 Pages: 89 - 90
Strong endomorphisms of π-connected automata André D. ParadisGabriel Thierrin Short Note 01 December 1980 Pages: 91 - 93
Generalized Green's theories C. E. ClarkJ. H. Carruth Research Article 01 December 1980 Pages: 95 - 127
On E-m semigroups which are bands of t-archimedean semigrops Ada Varisco Research Article 01 December 1980 Pages: 145 - 149
The free algebra in the variety generated by quasi-trivial semigroups Helmut Länger Research Article 01 December 1980 Pages: 151 - 156
The finiteness of a base of identities for five-element monoids A. V. Tishchenko Research Article 01 December 1980 Pages: 171 - 186
Lattice isomorphisms of commutative relatively free semigroups A. J. Ovsyannikov Research Article 01 December 1980 Pages: 189 - 225
A new notion in the theory of semigroup O. GrošekL. Satko Research Article 01 December 1980 Pages: 233 - 240
Embedding inverse semigroups in coset semigroups D. B. McAlister Research Article 01 December 1980 Pages: 255 - 267
On quasi-transitive semigroup actions Kripasindhu Sikdar Research Article 01 December 1980 Pages: 269 - 280
Subsemigroups of the finite complexes of a group F. D. PedersenWalter S. Sizer Research Article 01 December 1980 Pages: 285 - 292
A partially ordered space which is not a priestley space Albert Stralka Research Article 01 December 1980 Pages: 293 - 297
Zur Theorie der Stetigen Teilbarkeitshalbgruppen Bruno Bosbach Research Article 01 December 1980 Pages: 299 - 317
Archimedische Teilbarkeitshalbgruppen und quaderalgebren Bruno Bosbach Research Article 01 December 1980 Pages: 319 - 334
A band generated by two semilattices is regular Peter R Jones Research Article 01 December 1980 Pages: 335 - 341
The Hopf property and \(\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle\thicksim}$}}{K} \)-free products of semigroups Peter R Jones Research Article 01 December 1980 Pages: 343 - 368
Convolutions of probability measures on semigroups Franz Kinzl Research Article 01 December 1980 Pages: 369 - 383