1. Weak automorphisms of universal algebras

   • J. Sichler

   OriginalPaper Pages: 1 - 7

2. Onn-permutable congruences

   • J. Hagemann
   • A. Mitschke

   OriginalPaper Pages: 8 - 12

3. Free distributive pseudo-complemented lattices

   • A. Urquhart

   BriefCommunication Pages: 13 - 15

4. Direct decompositions into primary components

   • R. Baer

   OriginalPaper Pages: 16 - 50

5. Weak (projective) radius and finite equational bases for classes of lattices

   • C. Herrmann

   OriginalPaper Pages: 51 - 58

6. Elementary definability of symmetry groups

   • A. G. Pinus

   OriginalPaper Pages: 59 - 66

7. Une remarque sur la libre interpretabilite d’une relation par une autre

   • M. Pouzet

   OriginalPaper Pages: 67 - 71

8. Permanence of identities on algebras

   • M. N. Bleicher
   • Hans Schneider
   • R. L. Wilson

   OriginalPaper Pages: 72 - 93

9. Free Heyting algebras

   • A. Urquhart

   OriginalPaper Pages: 94 - 97

10. On universal Horn classes categorical in some infinite power

    • J. T. Baldwin
    • A. H. Lachlan

    OriginalPaper Pages: 98 - 111

11. The lattice of equational classes ofm-semigroups

    • W. F. Page
    • A. T. Butson

    OriginalPaper Pages: 112 - 126

12. Free generation in halfgroupoids

    • R. W. Ball

    Mailbox Pages: 127 - 128

13. Injective completenes of varieties of unary algebras: A remark on a paper of higgs

    • H. Lakser

    Mailbox Pages: 129 - 130

14. On free modular lattices generated by finite chains

    • R. Wille

    OriginalPaper Pages: 131 - 138

15. The class of topological spaces is equationally definable

    • G. A. Edgar

    OriginalPaper Pages: 139 - 146

16. Products of independent algebras with finitely generated identities

    • R. A. Knoebel

    OriginalPaper Pages: 147 - 151

17. A ‘natural’ theory without a prime model

    • J. T. Baldwin
    • A. R. Blass
    • D. W. Kueker

    OriginalPaper Pages: 152 - 155

18. A note on the elementary theory of finite abelian groups

    • D. W. Kueker

    OriginalPaper Pages: 156 - 159

19. Algebras with a maximalC-dependence property

    • A. C. Morel

    OriginalPaper Pages: 160 - 173

20. A proof of Baker’s finite-base theorem on equational classes generated by finite elements of congruence distributive varieties

    • M. Makkai

    OriginalPaper Pages: 174 - 181

21. Partial morphisms on partial algebras

    • V. S. Poythress

    OriginalPaper Pages: 182 - 202

22. Weak and strong equations in partial algebras

    • H. Höft

    OriginalPaper Pages: 203 - 215

23. The Frattini sublattice of a distributive lattice

    • M. E. Adams

    OriginalPaper Pages: 216 - 228

24. The congruence extension property and subdirectly irreducible algebras — An example

    • A. Day

    OriginalPaper Pages: 229 - 237

25. The structure of distributive doublep-algebras. Regularity and congruences

    • T. Katriňák

    OriginalPaper Pages: 238 - 246

26. Archimedean lattices

    • J. Martinez

    OriginalPaper Pages: 247 - 260

27. Polynomial functions with exponentiation are well ordered

    • A. Ehrenfeucht

    Mailbox Pages: 261 - 262

28. A Mal’cev condition for admissible relations

    • H. Werner

    Mailbox Pages: 263 - 263

29. Primality and model-completions

    • P. D. Bacsich

    OriginalPaper Pages: 265 - 270

30. An embedding theorem for partial algebras and the free completion of a free partial algebra within a primitive class

    • P. Burmeister

    OriginalPaper Pages: 271 - 279

31. A generalization of Lyndon’s theorem characterizing sentences preserved in subdirect products

    • T. Fujiwara

    OriginalPaper Pages: 280 - 287

32. Congruence relations of pseudocomplemented distributive lattices

    • J. Berman

    OriginalPaper Pages: 288 - 293

33. Frattini sublattices of distributive lattices

    • C. C. Chen
    • K. M. Koh
    • S. K. Tan

    OriginalPaper Pages: 294 - 303

34. On the Frattini sublattice of a finite modular planar lattice

    • K. M. Koh

    OriginalPaper Pages: 304 - 317

35. Epimorphisms and dominions, V

    • J. R. Isbell

    BriefCommunication Pages: 318 - 320

36. Construction of some subdirectly irreducible modularp-algebras

    • T. Katriňák

    OriginalPaper Pages: 321 - 327

37. The cardinality of the lattice of all equational classes ofp-algebras

    • T. Katrinňák

    BriefCommunication Pages: 328 - 329

38. On binary reducts of idempotent algebras

    • J. Płonka

    OriginalPaper Pages: 330 - 334

39. On the minimal extension of the sequence 〈0,0,2,4〉

    • J. Płonka

    OriginalPaper Pages: 335 - 340

40. A characterization of complete trellises of finite length

    • K. Gladstien

    OriginalPaper Pages: 341 - 344

41. A note on representable posets

    • Brian A. Davey

    BriefCommunication Pages: 345 - 347

42. Dilworth’s covering theorem for modular lattices: A simple proof

    • Bernhard Ganter
    • Ivan Rival

    BriefCommunication Pages: 348 - 350

43. Characterizing Mal’cev conditions

    • Walter Taylor

    OriginalPaper Pages: 351 - 397

44. p-Modularity implies modularity in equational classes

    • A. Day

    Mailbox Pages: 398 - 399

45. Products of absolute retracts

    • Walter Taylor

    Mailbox Pages: 400 - 401