Complete theories with only universal and existential axioms

Complete theories with only universal and existential axioms
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仅具有普遍和存在性公理的完整理论

DOI:
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发表时间:
1987
期刊:
Journal of Symbolic Logic (JSL)
影响因子:
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通讯作者:
A. Lachlan
A. Lachlan
中科院分区:
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文献类型:
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作者:
A. Lachlan

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设T是有限关系语言上的一个完备的一阶理论,它被普遍存在的句子公理化。证明了T几乎是平凡的,因为T的任何模型的宇宙都可以被写成。其中F是有限的,且I 1,I 2,…文中还讨论了有限关系语言上∃∀公理完备理论的一些结果。
Abstract Let T be a complete first-order theory over a finite relational language which is axiomatized by universal and existential sentences. It is shown that T is almost trivial in the sense that the universe of any model of T can be written . where F is finite and I 1, I 2, …, In are mutually indiscernible over F. Some results about complete theories with ∃∀-axioms over a finite relational language are also mentioned.