Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-22T06:50:45.864Z Has data issue: false hasContentIssue false

On the number of nonisomorphic models of size |T|

Published online by Cambridge University Press:  12 March 2014

Ambar Chowdhury*
Affiliation:
Department of Mathematics and Statistics, McMaster University, Hamilton, Ontario, CanadaL8S 4K1,, E-mail:[email protected]

Abstract

Let T be an uncountable, superstable theory. In this paper we prove

Theorem A. If T has finite rank, then I(|T|, T) ≥ ℵ0.

Theorem B. If T is trivial, then I(|T|, T) ≥ ℵ0.

Type
Research Article
Copyright
Copyright © Association for Symbolic Logic 1994

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.)

References

REFERENCES

[Ba] Baldwin, J., Fundamentals of stability theory, Springer-Verlag, Berlin, Heidelberg, and New York, 1988.CrossRefGoogle Scholar
[BoL] Bouscaren, E. and Lascar, D., Countable models of non-multidimensional ℵ0- stable theories, this Journal, vol. 48 ((983), pp. 197205.Google Scholar
[B1] Buechler, S., Nontrivial types of U-rank 1, this Journal, vol. 52 (1987), pp. 548551.Google Scholar
[B2] Buechler, S., The geometry of weakly minimal types, this Journal, vol. 50 (1985), pp. 10441053.Google Scholar
[Hr1] Hrushovski, E., Contributions to stable model theory, Ph.D. Thesis, University of California, Berkeley, California, 1986.Google Scholar
[Hr2] Hrushovski, E., Locally modular regular types, Classfication theory, Lecture Notes in Mathematics, vol. 1292, Springer-Verlag, Berlin, Heidelberg, and New York, 1987, pp. 132164.CrossRefGoogle Scholar
[L1] Lascar, D., Stability in model theory, Longman Scientific and Technical, Louvain, New York, 1987.Google Scholar
[L2] Lascar, D., Relation entre le range U et le poids, Fundamenta Mathematicae, vol. 121, 1984, pp. 117123.CrossRefGoogle Scholar
[Las] Laskowski, M. C., Uncountable theories that are categorical in a higher power, this Journal, vol. 53 (1988), pp. 512530.Google Scholar
[LasPR] Laskowski, M. C., Pillay, A., and Rothmaler, P., Tiny models of categorical theories, Archive for Mathematical Logic, vol. 31 (1992), pp. 385396.Google Scholar
[M] Makkai, M., A survey of basic stability theory, Israel Journal of Mathematics, vol. 49 (1984), pp. 181238.CrossRefGoogle Scholar
[PR] Pillay, A. and Rothmaler, P., Non-totally transcendental unidimensional theories, Archive for Mathematical Logic, vol. 30 (1990), pp. 93111.CrossRefGoogle Scholar
[Sa] Saffe, J., Categoricity and ranks, this Journal, vol. 49 (1984), pp. 13791382.Google Scholar
[Sh1] Shelah, S., On theories T categorical in | T|, this Journal, vol. 35 (1970), pp. 7382.Google Scholar
[Sh2] Shelah, S., Classification theory, North-Holland, Amsterdam and New York, 1990.Google Scholar
[ShB] Shelah, S. and Buechler, S., On the existence of regular types, Annals of Pure and Applied Logic, vol. 45 (1989), pp. 207308.CrossRefGoogle Scholar