Evaluating and generalizing constraint diagrams
Journal of Visual Languages and Computing
Diagrammatic Reasoning Systems
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Spider Diagrams of Order and a Hierarchy of Star-Free Regular Languages
Diagrams '08 Proceedings of the 5th international conference on Diagrammatic Representation and Inference
Journal of Visual Languages and Computing
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Journal of Visual Languages and Computing
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Artificial Intelligence
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The semantics of augmented constraint diagrams
Journal of Visual Languages and Computing
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Diagrams'10 Proceedings of the 6th international conference on Diagrammatic representation and inference
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IJCAR'12 Proceedings of the 6th international joint conference on Automated Reasoning
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On the expressiveness of spider diagrams and commutative star-free regular languages
Journal of Visual Languages and Computing
On the expressiveness of second-order spider diagrams
Journal of Visual Languages and Computing
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Spider diagrams are a visual language for expressing logical statements. In this paper we identify a well-known fragment of first-order predicate logic that we call MFOL=, equivalent in expressive power to the spider diagram language. The language MFOL= is monadic and includes equality but has no constants or function symbols. To show this equivalence, in one direction, for each diagram we construct a sentence in MFOL= that expresses the same information. For the more challenging converse we prove that there exists a finite set of models for a sentence S that can be used to classify all the models for S. Using these classifying models we show that there is a diagram expressing the same information as S.