Non-trivial expansions of 1-transitive ordered theories
DOI:
https://doi.org/10.70474/kr0e1035Keywords:
1-transitivity, convexity rank, expansion of a theory, ordered theory, rank for family of theories, Weak o-minimalityAbstract
Here we study non-trivial expansions of 1-transitive ordered theories preserving 1-transitivity. In particular, expansions of weakly o-minimal linear orderings by equivalence relations, unary functions and arbitrary binary relations were investigated. On the base of the obtained results values of ranks for various families of weakly o-minimal theories were found.
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[1] Macpherson H.D., Marker D., and Steinhorn C. Weakly o-minimal structures and real closed fields. Transactions of The American Mathematical Society, 2000, volume 352, No. 12, pp. 5435–5483. DOI: https://doi.org/10.1090/S0002-9947-00-02633-7
[2] Sudoplatov S.V. Ranks for families of theories and their spectra. Lobachevskii Journal of Mathematics, 2021, volume 42, No. 12, pp. 2959–2968. DOI: https://doi.org/10.1134/S1995080221120313
[3] Ikeda K., Pillay A., Tsuboi A. On theories having three countable models. Mathematical Logic Quarterly, 1998, volume 44, No. 2, pp. 161–166. DOI: https://doi.org/10.1002/malq.19980440203
[4] Sudoplatov S.V. Classification of Countable Models of Complete Theories. Novosibirsk, NSTU, Novosibirsk, parts 1 and 2, 2018.
[5] Baizhanov B.S. Expansion of a model of a weakly o-minimal theory by a family of unary predicates. The Journal of Symbolic Logic, 2001, volume 66, No. 3, pp. 1382–1414. DOI: https://doi.org/10.2307/2695114
[6] Kulpeshov B.Sh. Weakly o-minimal structures and some of their properties. The Journal of Symbolic Logic, 63 (1998), pp. 1511–1528. DOI: https://doi.org/10.2307/2586664
[7] Kulpeshov B.Sh. A criterion for binarity of almost ω-categorical weakly o-minimal theories. Siberian Mathematical Journal, vol. 62, No. 2, 2021, pp. 1063–1075. DOI: https://doi.org/10.1134/S0037446621060082
[8] Kulpeshov B.Sh. Countably categorical quite o-minimal theories. Journal of Mathematical Sciences, volume 188, issue 4, 2013, pp. 387–397. DOI: https://doi.org/10.1007/s10958-012-1136-1
[9] Verbovskiy V.V. On depth of functions of weakly o-minimal structures and an example of a weakly o-minimal structure without a weakly o-minimal theory. Proceedings of Informatics and Control Problems Institute, 1996, pp. 207–216.
[10] Verbovskiy V.V. On formula depth of weakly o-minimal structures. Algebra and Model Theory, (A.G. Pinus and K.N. Ponomaryov, editors), Novosibirsk, 1997, pp. 209–223.
[11] Kulpeshov B.Sh. Convexity rank and orthogonality in weakly o-minimal theories. News of the National Academy of Sciences of the Republic of Kazakhstan, physical and mathematical series, 227 (2003), pp. 26–31.
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