Strongly Complete Logics for Coalgebras
Strongly Complete Logics for Coalgebras
复制标题
代数的强完备逻辑
DOI:
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
J. Rosický
中科院分区:
文献类型:
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作者:
A. Kurz;J. Rosický
Coalgebras for a functor model different types of transition systems in a uni- form way. This paper focuses on a uniform account of finitary logics for set-based coalge- bras. In particular, a general construction of a logic from an arbitrary set-functor is given and proven to be strongly complete under additional assumptions. We proceed in three parts. Part I argues that sifted colimit preserving functors are those functors that preserve universal algebraic structure. Our main theorem here states that a functor preserves sifted colimits if and only if it has a finitary presentation by operations and equations. Moreover, the presentation of the category of algebras for the functor is obtained compositionally from the presentations of the underlying category and of the functor. Part II investigates algebras for a functor over ind-completions and extends the theorem of Jonsson and Tarski on canonical extensions of Boolean algebras with operators to this setting. Part III shows, based on Part I, how to associate a finitary logic to any finite-sets preserving functor T. Based on Part II we prove the logic to be strongly complete under a reasonable condition on T.
影响因子:
0.5
作者:
KURZ A
通讯作者:
KURZ A
影响因子:
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作者:
Kurz A
通讯作者:
Kurz A
影响因子:
1
作者:
Kurz A
通讯作者:
Kurz A