Congruences and ideals on Boolean modules: a heterogeneous point of view |
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Authors: | Sandra Marques Pinto M. Teresa Oliveira‐Martins |
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Affiliation: | Centro de Matemática da Universidade de Coimbra, Department of Mathematics, University of Coimbra, 3001‐454 Coimbra, Portugal |
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Abstract: | Definitions for heterogeneous congruences and heterogeneous ideals on a Boolean module $mathcal {M}$ are given and the respective lattices $mathrm{Cong}mathcal {M}$ and $mathrm{Ide}mathcal {M}$ are presented. A characterization of the simple bijective Boolean modules is achieved differing from that given by Brink in a homogeneous approach. We construct the smallest and the greatest modular congruence having the same Boolean part. The same is established for modular ideals. The notions of kernel of a modular congruence and the congruence induced by a modular ideal are introduced to describe an isomorphism between $mathrm{Cong}mathcal {M}$ and $mathrm{Ide}mathcal {M}$. This isomorphism leads us to conclude that the class of the Boolean module is ideal determined. |
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Keywords: | Relation algebras Boolean modules modular heterogeneous congruence modular heterogeneous ideal simple Boolean module MSC (2010) 03B70 03G05 03G15 06B10 06E25 08A68 |
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