Homomorphisms of extensions of a semigroup within a variety Václav Koubek OriginalPaper Pages: 8 - 19
Diagonal subalgebras and local polynomial functions of median algebras Hans -Jürgen Bandelt OriginalPaper Pages: 20 - 26
Sheaves of implicit operations in weak varieties of partial algebras Grzegorz Jarzembski OriginalPaper Pages: 72 - 88
Algebraic characterization of conflict-free varieties of partial algebras Leszek Rudak OriginalPaper Pages: 89 - 100
Classes closed under isomorphisms, retractions, and products Nikolai Weaver OriginalPaper Pages: 140 - 148