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Abstract
Every variable-free logic program induces a Pf P f -coalgebra on the set of atomic formulae in the program. The coalgebra p sends an atomic formula A to the set of the sets of atomic formulae in the antecedent of each clause for which A is the head. In an earlier paper, we identified a variable-free logic program with a Pf P f -coalgebra on Set and showed that, if C(Pf P f ) is the cofree comonad on Pf P f , then given a logic program P qua Pf P f -coalgebra, the corresponding C(Pf P f )-coalgebra structure describes the parallel and-or derivation trees of P. In this paper, we extend that analysis to arbitrary logic programs. That requires a subtle analysis of lax natural transformations between Poset-valued functors on a Lawvere theory, of locally ordered endofunctors and comonads on locally ordered categories, and of coalgebras, oplax maps of coalgebras, and the relationships between such for locally ordered endofunctors and the cofree comonads on them.
Original language | English |
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Title of host publication | Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) |
Pages | 268-282 |
Number of pages | 15 |
Volume | 6859 LNCS |
DOIs | |
Publication status | Published - 2011 |
Event | 4th International Conference on Algebra and Coalgebra in Computer Science, CALCO 2011 - Winchester, United Kingdom Duration: 30 Aug 2011 → 2 Sept 2011 |
Publication series
Name | Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) |
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Volume | 6859 LNCS |
ISSN (Print) | 03029743 |
ISSN (Electronic) | 16113349 |
Conference
Conference | 4th International Conference on Algebra and Coalgebra in Computer Science, CALCO 2011 |
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Country/Territory | United Kingdom |
City | Winchester |
Period | 30/08/11 → 2/09/11 |
Keywords
- Coalgebra
- Lawvere theories
- Lax natural transformations
- Logic programming
- Oplax maps of coalgebras
- SLD-resolution
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Dive into the research topics of 'Coalgebraic semantics for derivations in logic programming'. Together they form a unique fingerprint.Projects
- 1 Finished
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Fellowship CLANN EP/F044046/1: Computational Logic in Artificial Neural Networks
Dyckhoff, R. (PI)
1/10/08 → 30/09/11
Project: Fellowship