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Exploring Denotational Semantics and Simplicial Homology for Analyzing Logical Proofs


Основні поняття
The article proposes to study the external structure of logical proofs by interpreting them as faces of an abstract simplicial complex, and explores the use of simplicial homology to analyze the geometric properties of this representation.
Анотація

The article discusses the potential of using denotational semantics and simplicial homology to study the structure of logical proofs. It starts by introducing the concept of abstract simplicial complexes (ASCs) and their connection to the coherent semantics of Linear Logic. The author notes that while the coherent semantics can interpret proofs as simplices, the resulting ASC may contain simplices that do not correspond to actual proofs.

To address this, the article proposes to consider the sub-ASC [A] of the coherent semantics JAK, where the simplices correspond exactly to the interpretations of the proofs of the formula A. The author suggests that studying the geometric properties of [A], such as its homology, could provide insights into the proof-theoretical and computational properties of A.

The article then discusses the challenges in defining a suitable category of ASCs and a homology functor that would make the homology invariant under type isomorphisms. After exploring some unsuccessful attempts, the author presents a solution that involves transforming the ASC [A] into a new ASC I[A] using an endofunctor I on the category of ASCs. This transformation allows the homology to be defined in a functorial way, but it also changes the geometric properties of the original ASC.

The article concludes by raising several open questions about the relationship between the geometry of I[A] and the original ASC [A], and whether the transformation I is meaningful from a geometric or logical/computational perspective.

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Ключові висновки, отримані з

by Davide Barba... о arxiv.org 09-19-2024

https://arxiv.org/pdf/2409.11566.pdf
Denotational semantics driven simplicial homology?

Глибші Запити

What is the relationship between the geometric properties of the original ASC [A] and the transformed ASC I[A]? Are there cases where the homologies of [A] and I[A] differ, and what would this imply for the analysis of logical proofs?

The relationship between the geometric properties of the original abstract simplicial complex (ASC) [A] and the transformed ASC I[A] is fundamentally rooted in the nature of the transformation I. The transformation I takes the simplicial relations of [A] and converts them into simplicial maps, effectively altering the structure of the simplicial complex. This transformation tends to increase the dimensionality of the simplicial complex, as evidenced by the example where I∆1 results in ∆2. In terms of homology, it is crucial to note that while the geometric realizations of [A] and I[A] may not be homeomorphic, there are instances where their homologies remain invariant. This invariance suggests that despite the transformation, certain topological features—specifically those captured by homology—are preserved. However, it is also plausible that there exist cases where the homologies of [A] and I[A] differ. Such differences would imply that the geometric structure of the proofs represented by [A] and I[A] diverges in significant ways, potentially indicating that the logical proofs associated with these complexes exhibit different properties or behaviors. For instance, if I[A] reveals a higher-dimensional homology class that is absent in [A], it could suggest the presence of more complex proof structures or relationships that were not captured in the original representation.

How can the transformation I be interpreted from a logical or computational point of view? Does it have any meaningful implications for the study of logical proofs and their properties?

From a logical perspective, the transformation I can be interpreted as a means of refining the representation of proofs by converting qualitative simplicial relations into quantitative simplicial maps. This shift allows for a more structured analysis of the relationships between proofs, as it aligns with the notion of coherence in logical systems. By transforming simplicial relations into maps, I facilitates the application of algebraic topology tools, such as homology, to study the properties of logical proofs. The implications of this transformation for the study of logical proofs are significant. It enables researchers to explore the geometric and topological properties of proofs in a more rigorous manner, potentially uncovering new insights into the nature of proof structures. For example, the ability to analyze homology classes in I[A] could lead to a deeper understanding of the relationships between different proofs and their corresponding logical formulas. Furthermore, the transformation may highlight the presence of certain proof-theoretical phenomena, such as the existence of non-trivial cycles or boundaries, which could correlate with specific logical properties or computational behaviors.

Are there other approaches or techniques, beyond simplicial homology, that could be used to analyze the geometric structure of logical proofs and their denotational semantics? What insights could these alternative methods provide?

Yes, there are several alternative approaches and techniques that could be employed to analyze the geometric structure of logical proofs and their denotational semantics. Some of these include: Category Theory: Utilizing categorical frameworks can provide a high-level abstraction for understanding the relationships between different proof systems. By examining functors and natural transformations, researchers can gain insights into how different logical systems relate to one another and how proofs can be transformed across these systems. Topological Data Analysis (TDA): TDA offers tools such as persistent homology, which can capture the multi-scale topological features of data. Applying TDA to the study of logical proofs could reveal how proof structures evolve across different contexts or parameters, providing a richer understanding of their geometric properties. Graph Theory: Representing proofs as graphs can facilitate the analysis of their structural properties. Techniques from graph theory, such as network analysis, can uncover patterns and relationships within proof structures that may not be immediately apparent through simplicial homology alone. Higher-Dimensional Category Theory: Exploring higher-dimensional categories, such as (∞,1)-categories, can provide a framework for understanding the relationships between proofs in a more nuanced way. This approach could reveal higher-level coherence properties and relationships that are not captured by traditional homological methods. These alternative methods could provide complementary insights into the geometric structure of logical proofs, enhancing our understanding of their properties and the underlying semantics. For instance, category theory might elucidate the morphisms between different proof systems, while TDA could highlight the robustness of certain proof structures across varying contexts. Overall, integrating these approaches with simplicial homology could lead to a more comprehensive framework for analyzing logical proofs and their denotational semantics.
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