Abstract
In this paper, we show how the theory of monads can be used to deduce in a uniform manner several duality theorems involving categories of relations on one side and categories of algebras with homomorphisms preserving only some operations on the other. Furthermore, we investigate the monoidal structure induced by the Cartesian product on the relational side and show that in some cases, the corresponding operation on the algebraic side represents bimorphisms.
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Presented by M. Haviar.
Partial financial assistance by Portuguese funds through CIDMA (Center for Research and Development in Mathematics and Applications), and the Portuguese Foundation for Science and Technology (“FCT – Fundação para a Ciência e a Tecnologia”), within the project PEst-OE/MAT/UI4106/2014, and by the project NASONI under the contract PTDC/EEICTP/ 2341/2012 is gratefully acknowledged.
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Hofmann, D., Nora, P. Dualities for modal algebras from the point of view of triples. Algebra Univers. 73, 297–320 (2015). https://doi.org/10.1007/s00012-015-0324-5
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DOI: https://doi.org/10.1007/s00012-015-0324-5