1. Lattices of polynomials under substitution

   • J. A. Kalman

   OriginalPaper Pages: 1 - 7

2. Homomorphisms of extensions of a semigroup within a variety

   • Václav Koubek

   OriginalPaper Pages: 8 - 19

3. Diagonal subalgebras and local polynomial functions of median algebras

   • Hans -Jürgen Bandelt

   OriginalPaper Pages: 20 - 26

4. Generalized varieties

   • Nikolai Weaver

   OriginalPaper Pages: 27 - 52

5. On general theory of radicals

   • E. R. Puczyłowski

   OriginalPaper Pages: 53 - 60

6. Separable modes

   • A. B. Romanowska
   • J. D. H. Smith

   OriginalPaper Pages: 61 - 71

7. Sheaves of implicit operations in weak varieties of partial algebras

   • Grzegorz Jarzembski

   OriginalPaper Pages: 72 - 88

8. Algebraic characterization of conflict-free varieties of partial algebras

   • Leszek Rudak

   OriginalPaper Pages: 89 - 100

9. Distributive algebras in linear categories

   • B. Banaschewski
   • A. Pultr

   OriginalPaper Pages: 101 - 118

10. Composition générale des relations

    • Vladimir V. Topentcharov

    OriginalPaper Pages: 119 - 139

11. Classes closed under isomorphisms, retractions, and products

    • Nikolai Weaver

    OriginalPaper Pages: 140 - 148

12. Life is functionally complete

    • Béla Csákány

    OriginalPaper Pages: 149 - 150