1. Decidable unary varieties

   • Matthew A. Valeriote

   OriginalPaper Pages: 1 - 20

2. Heyting^* algebras, topological boolean algebras and P.O. systems

   • Alain Touraille

   OriginalPaper Pages: 21 - 31

3. On atoms in the lattice of quasivarieties

   • Wlesław Dziobiak

   OriginalPaper Pages: 32 - 35

4. Finite equational bases for subalgebra distributive varieties

   • J. Shapiro

   OriginalPaper Pages: 36 - 40

5. Primitive positive clones which are endomorphism clones

   • S. Burris

   OriginalPaper Pages: 41 - 49

6. Tidy Noether lattices

   • Linda Becerra

   OriginalPaper Pages: 50 - 59

7. Biatomic lattices

   • M. K. Bennett

   OriginalPaper Pages: 60 - 73

8. Affine complete varieties

   • Kalle Kaarli
   • Alden Pixley

   OriginalPaper Pages: 74 - 90

9. Arguesian lattices whose skeleton is a chain

   • James B. Nation
   • Douglas A. Pickering

   OriginalPaper Pages: 91 - 100

10. Saturated algebras in filtral varieties

    • Clifford Bergman

    OriginalPaper Pages: 101 - 110

11. Modules: Duals and principally generated fake duals

    • E. W. Johnson

    OriginalPaper Pages: 111 - 119

12. The word problem for Heyting algebras

    • Alain Touraille

    OriginalPaper Pages: 120 - 127

13. Coherent De Morgan algebras

    • R. Beazer

    OriginalPaper Pages: 128 - 136

14. Operation inducing systems

    • Gary Birkenmeier
    • Henry Heatherly

    OriginalPaper Pages: 137 - 148

15. Interpretations into Heyting algebras

    • Renato Lewin

    OriginalPaper Pages: 149 - 166

16. The infinite case of the edge-orbit conjecture

    • Simon Thomas

    OriginalPaper Pages: 167 - 168

17. On the scarcity of contravariant left adjunctions

    • George M. Bergman

    OriginalPaper Pages: 169 - 185

18. A note on algebraically and existentially closed structures

    • Stanley Burris

    OriginalPaper Pages: 186 - 187

19. On the behaviour of congruence-functors

    • Ervin Fried

    OriginalPaper Pages: 188 - 191

20. A × A congruence coherent impliesA congruence permutable

    • David M. Clark
    • Isidore Fleischer

    OriginalPaper Pages: 192 - 192

21. Finite models are one-generated

    • György Serény

    OriginalPaper Pages: 193 - 195