Geodesic
Extensive Subcategories in Universal Topological Algebras
Canadian journal of mathematics, Tome 29 (1977) no. 1, pp. 71-76

Voir la notice de l'article provenant de la source Cambridge University Press

Herrlich [7] has introduced the limit-operators to obtain every coreflective subcategory of the category Top of topological spaces and continuous maps. Using limit-operators, S. S. Hong [9] has constructed new reflective subcategories from a known extensive subcategory of a hereditary category of Hausdorff spaces and continuous maps. 
Choe, T. H.; Hong, Y. H. Extensive Subcategories in Universal Topological Algebras. Canadian journal of mathematics, Tome 29 (1977) no. 1, pp. 71-76. doi: 10.4153/CJM-1977-006-6
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