Hostname: page-component-8448b6f56d-c4f8m Total loading time: 0 Render date: 2024-04-24T04:32:01.576Z Has data issue: false hasContentIssue false

Modules of existentially closed algebras

Published online by Cambridge University Press:  12 March 2014

Paul C. Eklof
Affiliation:
Department of Mathematics, University of California, Irvine, California 92717
Hans-Christian Mez*
Affiliation:
Department of Mathematics, University of California, Berkeley, California 94720
*
Carl-Maria v. Weberstr. 1, D-7800 Freiburg, West Germany

Abstract

The underlying modules of existentially closed ⊿-algebras are studied. Among other things, it is proved that they are all elementarily equivalent, and that all of them are existentially closed as modules if and only if ⊿ is regular. It is also proved that every saturated module in the appropriate elementary equivalence class underlies an ex. ⊿-algebra. Applications to some problems in module theory are given. A number of open questions are mentioned.

Type
Research Article
Copyright
Copyright © Association for Symbolic Logic 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

1

Partially supported by NSF grant DSM-8400451

References

REFERENCES

[AF] Anderson, F. W. and Fuller, K. R., Rings and categories of modules, Springer-Verlag, Berlin, 1974.CrossRefGoogle Scholar
[B] Barwise, J., Back and forth through infinitary logic, Studies in model theory (Morley, M. D., editor), Mathematical Association of America, Buffalo, New York, 1973, pp. 534.Google Scholar
[BT] Belyaev, V. Ya. and Taĭitslin, M. A., On elementary properties of existentially closed systems, Uspekhi Matematicheskikh Nauk, vol. 34 (1979), no. 2 (200), pp. 3994; English translation in Russian Mathematical Surveys , vol. 34 (1979), no. 2, pp. 43–107.Google Scholar
[EM1] Eklof, P. C. and Mez, H.-Ch., The ideal structure of existentially closed algebras, this Journal, vol. 50 (1985), pp. 10251043.Google Scholar
[EM2] Eklof, P. C. and Mez, H.-Ch., Additive groups of existentially closed rings, Abelian groups and modules (Göbel, R. et al., editors), C. I. S. M. Courses and Lectures, no. 287, Springer-Verlag, Vienna, 1984, pp. 243252.Google Scholar
[ES] Eklof, P. C. and Sabbagh, G., Model-completions and modules, Annals of Mathematical Logic, vol. 2 (1971), 251295.CrossRefGoogle Scholar
[Fg] Feigelstock, S., Additive groups of rings, Pitman, London, 1984.Google Scholar
[F] Fuchs, L., Infinite abelian groups. Vols. 1, 2, Academic Press, New York, 1970, 1973.Google Scholar
[HW] Hirschfeld, J. and Wheeler, H. W., Forcing, arithmetic and division rings, Lecture Notes in Mathematics, vol. 454, Springer-Verlag, Berlin, 1975.CrossRefGoogle Scholar
[J] Jackett, D. R., Rings on certain mixed abelian groups, Pacific Journal of Mathematics, vol. 98 (1982), pp. 365373.CrossRefGoogle Scholar
[Mc] McCoy, N. H., The theory of rings, Chelsea, New York, 1973.Google Scholar
[P] Prest, M., Rings of finite representation type and modules of finite Morley rank, Journal of Algebra, vol. 88 (1984), pp. 502533.CrossRefGoogle Scholar
[S] Shelah, S., Classification theory and the number of nonisomorphic models, North-Holland, Amsterdam, 1978.Google Scholar
[W] Warfield, R. B. Jr., Rings whose modules have nice decompositions, Mathematische Zeitschrift, vol. 125 (1972), pp. 187192.CrossRefGoogle Scholar
[Z] Ziegler, M., Model theory of modules, Annals of Pure and Applied Logic, vol. 26 (1984), pp. 149213.CrossRefGoogle Scholar