Effective Descent Morphisms in Some Quasivarieties of Algebraic, Relational, and More General Structures |
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| Authors: | Ana Helena Roque |
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| Institution: | 1. Departamento de Matemática, Universidade de Aveiro, Campus Universitário de Santiago, 3810, Aveiro, Portugal. e-mail
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| Abstract: | We show that the class of effective descent morphisms coincides with the class of regular epimorphisms in suitable categories of internal structures in an exact category. In particular this applies to quasivarieties of (ordinary) first-order structures closed under strong homomorphic images. |
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