Model-Theoretic Conservative Extension for Definitional Theories
Model-Theoretic Conservative Extension for Definitional Theories
复制标题
定义理论的模型理论保守扩展
DOI:
10.1016/j.entcs.2018.10.009
复制
发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Tjark Weber
中科院分区:
文献类型:
--
作者:
A. Gengelbach;Tjark Weber
Many logical frameworks allow extensions, i.e. the introduction of new symbols, by definitions. Different from asserting arbitrary non-logical axioms, extensions by definitions are expected to be conservative: they should entail no new theorems in the original language. The popular theorem prover Isabelle implements a variant of higher-order logic that allowsad hocoverloading of constants. In 2015, Kunčar and Popescu introduceddefinitional theories, which impose a non-circularity condition on constant and type definitions in this logic, and showed that this condition is sufficient for definitional extensions to preserve consistency. We strengthen and generalize this result by showing that extensions of definitional theories are model-theoretic conservative, i.e. every model of the original theory can be expanded to a model of the extended theory.
DOI:
10.1145/2676724.2693175
发表时间:
2015
期刊:
Proceedings of the 2015 Conference on Certified Programs and Proofs
影响因子:
--
作者:
Ondřej Kunčar
通讯作者:
Ondřej Kunčar
DOI:
10.1007/978-3-662-54434-1_27
发表时间:
2017
期刊:
影响因子:
--
作者:
Ondřej Kunčar;Andrei Popescu
通讯作者:
Andrei Popescu
影响因子:
--
作者:
Ondřej Kunčar;Andrei Popescu
通讯作者:
Andrei Popescu