期刊
JOURNAL OF MATHEMATICAL LOGIC
卷 21, 期 2, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0219061321500100
关键词
Model completeness; model companions; stability; generic predicates
类别
By defining the interpolative fusion T-boolean OR*, we generalize many examples of random or generic structures in the model-theoretic literature and develop new tools to show that theories of interest have model companions.
We define the interpolative fusion T-boolean OR* of a family (T-i)(i is an element of I) of first-order theories over a common reduct T-boolean AND, a notion that generalizes many examples of random or generic structures in the model-theoretic literature. When each T-i is model-complete, T-boolean OR* coincides with the model companion of T-boolean OR = boolean OR T-i is an element of I (i). By obtaining sufficient conditions for the existence of T-boolean OR*, we develop new tools to show that theories of interest have model companions.
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