TY - Type of reference TI - Sous-catégories extensibles au sens de Kan et la topologie par fibre AU - Moncef Ghazel AB - We use pointwise Kan extensions to generate new subcategories out of old ones. We investigate the properties of these newly produced categories and give sufficient conditions for their cartesian closedness to hold. Our methods are of general use. Here we apply them particularly to the study of the properties of certain categories of fibrewise topological spaces. In particular, we prove that the categories of fibrewise compactly generated spaces, fibrewise sequential spaces and fibrewise Alexandroff spaces are cartesian closed provided that the base space satisfies the right separation axiom. DO - 10.21494/ISTE.OP.2024.1199 JF - Avancées en Mathématiques Pures et Appliquées KW - Reflective subcategory, Reflective hull, Dense functor, Kan extension, Codensity monad, Cartesian closed category, Fibrewise topological space, Reflective subcategory, Reflective hull, Dense functor, Kan extension, Codensity monad, Cartesian closed category, Fibrewise topological space, L1 - http://openscience.fr/IMG/pdf/iste_apam24v15n4_2.pdf LA - fr PB - ISTE OpenScience DA - 2024/09/18 SN - 1869-6090 TT - Kan extendable subcategories and fibrewise topology UR - http://openscience.fr/Sous-categories-extensibles-au-sens-de-Kan-et-la-topologie-par-fibre IS - Numéro 4 (Septembre 2024) VL - 15 ER -