Cuts for circular proofs: semantics and cut-elimination
Cuts for circular proofs: semantics and cut-elimination
复制标题
循环证明的剪切:语义和剪切消除
DOI:
10.4230/lipics.csl.2013.248
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发表时间:
2013
期刊:
影响因子:
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通讯作者:
L. Santocanale
中科院分区:
文献类型:
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作者:
J. Fortier;L. Santocanale
One of the authors introduced in [Santocanale, FoSSaCS, 2002] a calculus of circular proofs for studying the computability arising from the following categorical operations: finite products, finite coproducts, initial algebras, final coalgebras. The calculus presented [Santocanale, FoSSaCS, 2002] is cut-free; even if sound and complete for provability, it lacked an important property for the semantics of proofs, namely fullness w.r.t. the class of intended categorical models (called mu-bicomplete categories in [Santocanale, ITA, 2002]).
In this paper we fix this problem by adding the cut rule to the calculus and by modifying accordingly the syntactical constraint ensuring soundness of proofs. The enhanced proof system fully represents arrows of the canonical model (a free mu-bicomplete category). We also describe a cut-elimination procedure as a a model of computation arising from the above mentioned categorical operations. The procedure constructs a cut-free proof-tree with possibly infinite branches out of a finite circular proof with cuts.
影响因子:
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作者:
Bertot Y
通讯作者:
Bertot Y