Abstract
In this paper we investigate several conservative expansions of substructural logics, and of fuzzy logics in particular. The most important are the expansion by \(\Delta \) and the expansion by propositional quantifiers, with applications to Craig interpolation. In the last part of the paper we show that in several expansions of MTL it is possible to add conservatively the Łukasiewicz connectives, as well as a new kind of product.
J. Amidei—This work was carried out during a Ph.D position at Scuola Normale Superiore di Pisa, Piazza dei Cavalieri, 7 56126 Pisa Italy.
F. Montagna—Sadly, Franco Montagna passed away in February 2015. He had sent to the editors a revised version of this paper in October 2014. Although he contributed in a definitive way to its writing, unfortunately he could not work on its last version. So, any imprecision should be attributed to the other authors.
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The authors thank an anonymous referee for his comments on a previous version of this paper.
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Amidei, J., Ertola-Biraben, R.C., Montagna, F. (2022). Conservative Expansions of Substructural Logics. In: Galatos, N., Terui, K. (eds) Hiroakira Ono on Substructural Logics. Outstanding Contributions to Logic, vol 23. Springer, Cham. https://doi.org/10.1007/978-3-030-76920-8_10
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