1. Viktor Aleksandrovich Gorbunov 1950-1999

   Pages: 1 - 5

2. Skeletons of quasivarieties with the Fraser-Horn property

   • A. G. Pinus

   Pages: 7 - 13

3. On coatoms in lattices of quasivarieties of algebraic systems

   • A. I. Budkin

   Pages: 15 - 24

4. Discriminator or dual discriminator?

   • Ervin Fried

   Pages: 25 - 41

5. Antivarieties and colour-families of graphs

   • Viktor Gorbunov
   • Alexandr Kravchenko

   Pages: 43 - 67

6. Varieties of semigroups with non-trivial identities on subsemigroup lattices

   • V. B. Repnitskii

   Pages: 69 - 73

7. $ {\cal L} $-subvarieties of the variety of idempotent semirings

   • Zhao Xianzhong
   • K. P. Shum
   • Y. Q. Guo

   Pages: 75 - 96

8. Decidability of finite quasivarieties generated by certain transformation semigroups

   • M. V. Volkov

   Pages: 97 - 103

9. Categorical equivalence of varieties and invariant relations

   • K. Denecke
   • O. Lüders

   Pages: 105 - 118

10. Regular congruence-preserving extensions of lattices

    • G. Grätzer
    • E. T. Schmidt

    Pages: 119 - 130

11. Geometrical aspect of databases and knowledge bases

    • T. Plotkin
    • B. Plotkin

    Pages: 131 - 161

12. Products of coalgebras

    • H. Peter Gumm
    • Tobias Schröder

    Pages: 163 - 185

13. A note on lattice congruence regularization

    • Harry Lakser

    Pages: 187 - 191

14. Quasivarieties of Cantor algebras

    • M. S. Sheremet

    Pages: 193 - 201

15. On lower bounded lattices

    • K. V. Adaricheva
    • V. A. Gorbunov

    Pages: 203 - 213

16. On continuous noncomplete lattices

    • K. V. Adaricheva
    • V. A. Gorbunov
    • M. V. Semenova

    Pages: 215 - 230

17. On clones, transformation monoids, and finite Boolean algebras

    • A. A. Krokhin

    Pages: 231 - 236

18. Conditions satisfied by clone lattices

    • Andrei A. Bulatov

    Pages: 237 - 241

19. Each complexity-two word represents every sufficiently long spike

    • Nereu E. Burin
    • John R. Isbell
    • D. M. Silberger

    Pages: 243 - 251

20. Finite-to-finite universal quasivarieties are Q-universal

    • M. E. Adams
    • W. Dziobiak

    Pages: 253 - 283

21. Natural dualities for quasivarieties generated by a finite commutative ring

    • David M. Clark
    • Pawel M. Idziak
    • Ross Willard

    Pages: 285 - 320

22. Notes on sums of algebras, subdirect products and subdirectly irreducible algebras

    • Anna Romanowska

    Pages: 321 - 341