María Jesús Iranzo, Francisco Pérez Monasor (1988)
Publicacions Matemàtiques
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In this paper we prove that all finite groups have F-injectors with respect to a saturated and extensible Fitting formation F.
Antonio Vera López (1986)
Revista de la Real Academia de Ciencias Exactas Físicas y Naturales
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J. M. Sanz Serna (1976)
Gaceta Matemática
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Cristina Martínez Calvo (1979)
Revista Matemática Hispanoamericana
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Let P be a small category and A(B) a category such that the functor A → A (B → B) determined by the projection functor A x P → A (B x P → B) has an adjoint for all small category P. A functor G: B → A has an adjoint functor if and only if it has and adjoint functor "via" evaluation. If Q is another small category and F: P → Q an arbitrary functor, the functor A: A → A has an adjoint functor.
Lía Oubiña (1968)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
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Francisco Javier Erice Rodríguez (1974)
Gaceta Matemática
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A. R.-Grandjean, A. Martínez Cegarra (1980)
Collectanea Mathematica
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P. Pascual Gaínza (1986)
Collectanea Mathematica
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Miguel Torres Iglesias (1975)
Gaceta Matemática
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Julio Lafuente López (1979)
Revista Matemática Hispanoamericana
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All groups to be considered are finite. The main result of this paper is the following: the normal Schunck classes compose a complete and distributive lattice antiisomorphic to the lattice composed by the Derived classes (s. [5]). It begins with a first section of machinery which establishes that the Derived classes are precisely the classes of groups G such that every simple section of G appartains to a σ-closed class (s. 1.6) of simple groups; therefore the Derived classes are a natural...