On the cut-elimination of the modal $μ$-calculus: Linear Logic to the rescue

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Hauptverfasser: Bauer, Esaïe, Saurin, Alexis
Format: Preprint
Veröffentlicht: 2025
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author Bauer, Esaïe
Saurin, Alexis
author_facet Bauer, Esaïe
Saurin, Alexis
contents This paper presents a proof-theoretic analysis of the modal $μ$-calculus. More precisely, we prove a syntactic cut-elimination for the non-wellfounded modal $μ$-calculus, using methods from linear logic and its exponential modalities. To achieve this, we introduce a new system, \muLLmodinf{}, which is a linear version of the modal $μ$-calculus, intertwining the modalities from the modal $μ$-calculus with the exponential modalities from linear logic. Our strategy for proving cut-elimination involves (i) proving cut-elimination for \muLLmodinf{} and (ii) translating proofs of the modal mu-calculus into this new system via a ``linear translation'', allowing us to extract the cut-elimination result.
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id arxiv_https___arxiv_org_abs_2506_09791
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle On the cut-elimination of the modal $μ$-calculus: Linear Logic to the rescue
Bauer, Esaïe
Saurin, Alexis
Logic in Computer Science
This paper presents a proof-theoretic analysis of the modal $μ$-calculus. More precisely, we prove a syntactic cut-elimination for the non-wellfounded modal $μ$-calculus, using methods from linear logic and its exponential modalities. To achieve this, we introduce a new system, \muLLmodinf{}, which is a linear version of the modal $μ$-calculus, intertwining the modalities from the modal $μ$-calculus with the exponential modalities from linear logic. Our strategy for proving cut-elimination involves (i) proving cut-elimination for \muLLmodinf{} and (ii) translating proofs of the modal mu-calculus into this new system via a ``linear translation'', allowing us to extract the cut-elimination result.
title On the cut-elimination of the modal $μ$-calculus: Linear Logic to the rescue
topic Logic in Computer Science
url https://arxiv.org/abs/2506.09791