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Preprint Number 981
981. Sergey V. Sudoplatov
Combinations of structures
Submission date: 1 January 2016.
We investigate combinations of structures by families of structures relative to families of unary predicates and equivalence relations. Conditions preserving ω-categoricity and Ehrenfeuchtness under these combinations are characterized. The notions of e-spectra are introduced and possibilities for e-spectra are described.
Mathematics Subject Classification: 03C30, 03C15, 03C50
Keywords and phrases:
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