Skip to main content
Log in

On the relationship of AP, RS and CEP in congruence modular varieties

  • Published:
algebra universalis Aims and scope Submit manuscript

Abstract

A condition is found on a congruence modular variety, guaranteeing that the implication AP & RS⇒CEP holds. The condition is in terms of the commutator on congruence lattices. In particular, the implication holds for any congruence distributive variety whose free algebra on four generators is finite.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. C. Bergman,Amalgamation classes of some distributive varieties, Algebra Universalis,20 (1985), 143–166.

    Google Scholar 

  2. S. Burris andH. P. Sankappanavar,A Course in Universal Algebra, Springer-Verlag, New York, 1981.

    Google Scholar 

  3. A. Day,A note on the congruence extension property, Algebra Universalis,1 (1971), 234–235.

    Google Scholar 

  4. R.Freese and R.McKenzie,The commutator, an overview, preprint.

  5. R. Freese andR. McKenzie,Residually small varieties with modular congruence lattices, Trans. Amer. Math. Soc.,264 (1981), 419–430.

    Google Scholar 

  6. H. P. Gumm,An easy way to the commutator in modular varieties, Arch. d. math.,34 (1980), 220–228.

    Google Scholar 

  7. J. Hagemann andC. Herrmann,A concrete ideal multiplication for algebraic systems and its relation to congruence distributivity, Arch. d. Math.,32 (1979), 234–245.

    Google Scholar 

  8. E. Kiss,Injectivity and related concepts in modular varieties I–II, Bull. Australian Math. Soc.,32 (1985), 35–53.

    Google Scholar 

  9. J. Kollár,Injectivity and congruence extension property in congruence distributive equational classes, Algebra Universaiis,10 (1980), 21–26.

    Google Scholar 

  10. R. McKenzie,Narrowness implies uniformity, Algebra Universalis, 15 (1982), 67–85.

    Google Scholar 

  11. W.Taylor,Equational logic, Houston Journal of Mathematics, Survey 1979.

  12. W. Taylor,Residually small varieties, Algebra Universalis,2 (1972) 33–53.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Bergman, C. On the relationship of AP, RS and CEP in congruence modular varieties. Algebra Universalis 22, 164–171 (1986). https://doi.org/10.1007/BF01224023

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01224023

Keywords

Navigation