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Preprint Number 1458
1458. Pierre Simon NIP omega-categorical structures: the rank 1 case E-mail: Submission date: 18 July 2018 Abstract: We classify primitive, rank 1, omega-categorical structures having polynomially many types over finite sets, or equivalently at most exponential growth of the number of finite substructures. For a fixed number of 4-types, we show that there are only finitely many such structures and that all are built out of finitely many linear orders interacting in a restricted number of ways. As an example of application, we deduce the classification of primitive structures homogeneous in a language consisting of n linear orders as well as all reducts of such structures. Mathematics Subject Classification: 03C15, 03C64, 03C68, 06A05 Keywords and phrases: |
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